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Abrasive Wheels
- Aluminium Cutting & Grinding Wheels
  These abrasive cutting and grinding discs are suitable for working on all types of aluminium and non-ferrous applications, the grinding wheels are designed to give a high stock removal whilst the cutting discs deliver a fast, accurate and clean cut. Both products offer the user excellent wear characteristics and a superb lifetime. These products are bonded, fully reinforced and are manufactured to european standards.
- Metal Cutting & Grinding Wheels
  These steel cutting and grinding discs are suitable for working on all types of metal and steel applications, the grinding wheels provide high stock removal whilst the cutting discs deliver a fast, accurate and clean cut. Both products offer the user superb wear characteristics and an excellent lifetime. These products are fully reinforced, bonded, and are manufactured to european standards.
- Stainless Steel Cutting & Grinding Wheels
  These stainless steel cutting and grinding discs have been developed in close connection with the ship building and chemical industries and use high quality grain in their manufacture which is free from iron and sulphur. Suitable for the cutting and grinding of all types of stainless steel, these products are bonded, fully reinforced and are manufactured to european standards.
- Stone Cutting & Grinding Wheels
  These cutting and grinding discs produce excellent results when cutting all types of stone or concrete, in addition these products will cut and grind non ferrous metals like cast iron, copper and brass. Both products offer the user excellent wear characteristics and lifetime. These products are bonded, fully reinforced and are manufactured to european standards.
- Ultra Thin INOX Cutting & Grinding Wheels
  Inox cutting discs are a specialist produced disc now provided to the mainstream market offering the user a fast and accurate cut in all types of steel and stainless steel applications. These ultra thin cutting wheels are iron, sulphur and chlorine free to avoid contamination during use i.e prevention of rust. The ultra thin inox cutting disc is fully reinforced, bonded and manufactured to the highest european standard.
Bench, Road & Tile Saws
- Tiles Saws
- Roadsaws
Building Metal Works
Ceramic, Porcelain Cutting & Drilling
- Cutting
  The Ultra Hard Materials blade has been developed to deal with the fast cutting of hard stone, products and man made fired materials such as porcelain and harder ceramic products. The Ceramic Tile blade has been developed to cut medium density ceramic floor and wall tiles.
- Drilling
  This is a simple and easy to use lightweight drilling system for the quick and effective drilling of hard ceramic and porcelain tiles. These products are self sharpening and produce their best results when they are used in hand held battery drills with a 13mm three jaw chuck. These ceramic drills have to be used in conjunction with the mini guide and the high pressure water system. For more detailed information on how to drill hard ceramic, porcelain or granite tiles take a look at the technical data section above.
- Ultra Hard Material Drilling System
  Mexco Professional tile drilling system. The perfect tool for drilling the denser ultra hard decorative wall and floor tiles. Perfect for: Granite, Marble, Porcelain, Ceramic and Terracotta Tiles. For more detailed information on how to drill hard ceramic, porcelain or granite tiles take a look at the technical data section above.
Clearance Stock
Diamond Blades
- Abrasive Materials Diamond Blades
  Applications for Abrasive Materials Diamond Blades: Limestone Aggregate Concrete, Concrete Paviours, Soft Facing Brick, Concrete Blocks over 15Kn, Hard Sandstone, Soft Slate, Medium Sandstone, Concrete Roof Tiles, Concrete with Med Sharp Sandstone, Coarse Sandstone, Asphalt Over Concrete, Shallow Concrete Screed, Breeze Block, Concrete Block Under 15kn, Green Concrete.
- Asphalt Extreme Abrasive Diamond Blades
  Applications for Asphalt Extreme Abrasive Diamond Blades: Coarse Sandstone, Asphalt Over Concrete, Shallow Concrete Screed, Breeze Block, Concrete Block Under 15kn, Green Concrete.
- Ceramic Cutting Diamond Blade
  Applications for Ceramic cutting Diamond Blades: Porcelain, Hard Marble, Marble Tiles, Ceramic Tiles.
- Dual Purpose Turbo Diamond Blade
- Dual Purpose Abrasive Diamond Blades
  Applications for Dual Purpose Diamond Blades: Non Abrasive Indian Sandstone, Hard Facing Bricks, Medium Facing Bricks, Quarry Tiles, Hard Slate, River Gravel Aggregate Concrete, Flint Aggregate Concrete, Reinforced Concrete, Concrete Kerbs, Concrete Slabs, Reinforced Lintels, Hard Limestone, Limestone Aggregate Concrete, Concrete Paviours, Soft Facing Bricks, Concrete Blocks Over 15Kn, Hard Sandstone, Soft Slate, Medium Sandstone, Concrete Roof Tiles, Concrete with Medium Sharp Sandstone, Coarse Sandstone, Asphalt over Concrete, Shallow Concrete Screed, Breeze Blocks, Concrete Block under 15Kn, Green Concrete, Lignacite Blocks, Asphalt.
- General Purpose Non Abrasive Concrete Diamond Blade
  Applications for General Purpose Diamond Blades: Medium Facing Bricks, Quarry Tiles, Hard Slate, River Gravel Aggregate Concrete, Flint Aggregate Concrete, Reinforced Concrete, Concrete Kerbs, Concrete Slabs, Reinforced Lintels, Hard Limestone, Limestone Aggregate Concrete, Concrete Paviours, Soft Facing Bricks, Concrete Blocks Over 15Kn, Hard Sandstone
- Tri-Purpose Diamond Blade
  Applications for Tri-Purpose Diamond Blades: Ductile Iron, Granite, Class A Engineering Brick, Clay Paviours, Clay Pipes Vitified, Clay Roof Tiles, Non Abrasive Indian Sandstone, Hard Facing Bricks, Medium Facing Bricks, Quarry Tiles, Hard Slate, River Gravel Aggregate Concrete, Flint Aggregate Concrete, Reinforced Concrete, Concrete Kerbs, Concrete Slabs, Reinforced Lintels, Hard Limestone, Limestone Aggregate Concrete, Concrete Paviours, Soft Facing Bricks, Concrete Blocks Over 15Kn, Hard Sandstone, Soft Slate, Medium Sandstone, Concrete Roof Tiles, Concrete with Medium Sharp Sandstone, Coarse Sandstone, Asphalt over Concrete, Shallow Concrete Screed, Breeze Blocks, Concrete Block under 15Kn, Green Concrete, Lignacite Blocks, Asphalt
- Hard Aggregate Concrete Diamond Blade
  Applications for Hard Aggregate Concrete Diamond Blades: Hard Facing Bricks, Medium Facing Bricks, Quarry Tiles, Hard Slate, River Gravel Aggregate Concrete, Flint Aggregate Concrete, Reinforced Concrete, Concrete Kerbs, Concrete Slabs, Reinforced Lintels, Hard Limestone, Limestone Aggregate Concrete, Concrete Paviours, Soft Facing Bricks, Concrete Blocks Over 15Kn, Hard Sandstone, Soft Slate
- Hard Materials Diamond Blades
  Applications for Hard Material Diamond Blades: Ductile Iron, Granite, Class A Engineering Brick, Clay Paviours, Clay Pipes Vitified, Clay Roof Tiles, Non Abrasive Indian Sandstone, Hard Facing Bricks, Medium Facing Bricks, Quarry Tiles, Hard Slate, Flint Aggregate Concrete
- Ultra Hard Materials Diamond Blades
  Applications for Ultra Hard Materials Diamond Blades: Porcelain, Hard Marble, Marble Tiles, Ceramic Tiles, Ductile Iron, Granite, Class A Engineering Brick, Clay Paviours, Clay Pipes Vitified, Clay Roof Tiles, Non Abrasive Indian Sandstone, Hard Facing Bricks, Medium Facing Bricks, Quarry Tiles, Hard Slate, River Gravel Aggregate Concrete, Flint Aggregate Concrete
Diamond Core Drills & Accessories
- Dry Core Drill Bits
  Dry Core Drill Bits for cutting: Soft Facing Bricks, Concrete Blocks, Hard Sandstone, Coarse Sandstone, Soft slate, Breeze Block, Lignacite Blocks
- Wet Core Drill Bits
  Professional wet cut only diamond core drill bits for the drilling of: Reinforced Concrete, Flint Concrete, Limestone Aggrtegate Concrete, River Gravel Concrete and Granite Aggregate Concrete. Rooftop Segment, excellent speed and lifetime.
- Core Drill Drilling Rigs
  ADP Diamex offer a compact and lightweight selection of core drill rigs for heavy drilling. These diamond drilling rigs are in a class of there own offering the user fantastic performance and reliablility when drilling with larger wet diamond core drill bits. The drilling rigs listed work perfectly in conjuction with our range of weka drill motors. Using drill rigs offer the user more flexability when wet diamond drilling allowing the driller to operate the motor with more of a supervisory role.
- Drilling Motors & Rigs
  ADP Diamex offer a wide range of Weka hand held drill motors and also Weka rig mounted motors. Weka drill motors offer the user unrivaled reliablility and robustness, these machines can cope with the rigors of wet diamond drilling with ease due to their metal casing, oil bath lubrication and overload protection. If you need to wet drill granite or concrete you should make Weka your first choice in drill motors. Weka Drill motor spares parts are also available upon request.
Disc Cutters & Accessories
Drill Bits & Steels
- Auger Bits
  Application: Hard wood, soft wood, chipboard and plywood. Mexco Auger bits are made from high carbon steel with a threaded tip and precision ground for longer life. Hex Shank prevents slippage in drill chuck
- Auger Kit
  Application: Hard wood, soft wood, chipboard and plywood. Mexco Auger bits are made from high carbon steel with a threaded tip and precision ground for longer life. Hex Shank prevents slippage in drill chuck. The 5 piece set hex shank contains: 10mm, 12mm, 16mm, 18mm, 25mm (overall length 230mm).
- Flat Wood Bits
  Application: Hard or Soft Wood. Flat bit with grooved head for improved centering and discharge. Hexagon shank to prevent chuck slippage. Tri-Point design for more accurate and cleaner cut Exceptional Value Bit
- HSS Fully Ground
  Application: Steel, Aluminium, Cast Iron, Brass, Copper & Cast Iron. High quality HSS bits with a fully ground tip giving fast and accurate drilling. Milled body ensures steel characteristics are maintained and further improves accuracy.
- Masonry Straight Body
  Application: Brick, Concrete, Stone, Masonry & Blockwork. High quality standard masonry drill bits with tungsten carbide tip.
- SDS MAX
  Exceptional value cross head SDS Max Drill Bits. Cross head design increases drilling speed and performance. Copper brazed Tungsten carbide tip to withstand extreme heat generation. Application: Brick, Concrete, Stone, Masonry & Blockwork.
- SDS Plus Masonry Drill Bits
  Application: Brick, Concrete, Stone, Masonry & Blockwork. Professional SDS Plus Drill Bits.
- SDS Plus Masonry Chisels
  SDS Max Fitment and SDS Plus Fitment. Point, Flat, Wide and Winged Gouge.
Pipe Clips & Accessories
- Pipe Clips
- Pipe Collars
  A range of pipe collars that conceal unsightly penetrations through floors, walls etc. Ideal for use to compliment chrome pipework and plumbing fittings.
Hand Tools
- Building & Plastering Tools
  ADP Diamex offer a huge range of hand tools from various manufacturers such as Stanley, Irwin, Marshalltown, Faithfull and Marples. Because of the vast range of tools available not all products are shown here. If you cannot find what you are looking for here please give one of our helpful sales team a call.
- Spanners & Sockets
  ADP Diamex offer a selection of Combination Spanners and Socket sets. If you cannot find what you are looking for then please give one of our helpful sales team a call.
- Faithfull Tools
  ADP Diamex offers a range of various tools from Faithfull. Due to the vast range of tools available please give one of our helpful sales team a call if you cannot find what you are looking for.
- Pliers & Grips
- Woodworking Tools
- Adjustable Wrenches
- Hex & Torx Keys
- Hammers & Axes
- General Handtool & Accessories
- Screwdrivers
- Hand Saws
  ADP Diamex offers a comprehensive selection of Hand saws to cut everything from sheet materials down to a plastic pipe or facia board.
- Assortment Packs
Holesaws
ICS Chainsaws & Accessories
- Petrol Chainsaws & Accessories
  When the application requires you to make deep cuts of upto 400mm into concrete, masonry or reinforced concrete the only choice should be a concrete chainsaw. Over recent years the petrol masonry chainsaw has evolved into a must have piece of equipment for the serious tradesman, with its deep depth of cut these concrete saws provide the user with the versatility to cut a range of building materials twice as deep as a normal disc cutter. In addition to deep cuts in concrete these ICS chainsaws provide the user with the ability to cut square corners with no over runs and the ability to access small areas without the need for large and cumbersome cutting equipment.
- Hydraulic Chainsaws & Accessories
  Hydraulic chainsaws by ICS enable the user to make cuts of upto 630mm (25") in reinforced concrete and other hard masonry materials, these concrete saws provide the user with the verstility to access areas that previously could not have been feasible with traditional concrete sawing methods. In addition to the hydraulic chainsaws ICS offer high power hydraulic power packs, flow adaptors and speed hook systems to power and assist their saws.
Ladders, Levels & Measuring
- Levels & Measuring
- Ladders & Steps
Oregon PowerSharp
Power Tools
- Makita
- Sealey
- Skil Masters
Power Tool Accessories
- Router Cutters
- Screwdriver Bits
  Makita Screwdriver bits are produced in Europe to Makita's high quality standard using special S2 alloyed steel and a state-of-the-art heat treatment process.This high standard ensures a 100% compliance to DIN standards and enables an excellent fit to screw heads with a close toerance on hardness and torque performance resulting in one ofthe most efficient accessories available. All bits are laser branded with bit-type for easy user identification. The packaging is produced in a way that maximises the recycling potential.
- Collated Screwdriver Bits
- Multi Tool Blades
Sanding Belts & Rolls
- Belts
- Discs
- Rolls
- Sheets
- Sanding Blocks
Saw Blades & Jigsaws Blades
- Circular Saw Blades
  The mexco range of tunsten carbide saw blades have been manufactured to widthstand the demanding needs and high expectations of the professional tradesman whilst being offered at a price which is attractive to the diy enthusiast alike. We offer a comprehensive range of TCT blades ranging in size from 150mm to 315mm with various tooth counts, bore sizes and tooth forms to cover virtually all applications. Information: The general rule is that the more teeth on a saw blade the finer the cut however the more teeth on a tct blade will also reduce cutting speeds, a TCT blade with a medium tooth configuration will usually suit most saw tools in the majority of wood cutting applications and produce clean and effective cutting speeds.
- Sabre/Reciprocating Sawblades
Screws, Nails & Fixings
- Screws
- Nails, Pins & Clips
- Nuts & Bolts
  Carriage bolts, Hex bolts, Gutter bolts. A selection of washers, Dome nuts.
- Cable Ties
- Nailers & Staplers
- Resin / Chemical Anchors
- Wall Plugs
Sealants, Adhesives, Additives & Paints
- Everbuild Wipes, Cleaners & Lubricants
- Survey & Line Marking Paints
- JETCEM Repair Packs
  Jetcem the leading brand for premixed mortars and repair cements is now manufactured by Everbuild, all of these products are available through ADP Diamex where you can buy online or through our telephone order line.
- Fillers
  Everbuild Metolux Profill filler and a selection of Everbuild wood fillers.
- Fire Cements & Mortars
  Fire Cements (Cartridges and Tubs) , Flue Jointing.
- Expanding Foam & Accessories
  Gun Grade, Fire Foam, Fix & Fill, Heavy duty metals guns.
- Decorating
  Fillers, A selection of Dust sheets, Turps Substitute, White Spirit, Methylated Spirit, Linseed Oil, Teak Oil, Patent Knotting
- Building Additives
  Everbuild Building Products, Mortar Mix, Optimix, Frost Proofer, Cement Colourant, Brick Cleaner, Water Proofer.
- Adhesive Tapes
  A wide selection of tapes ideal for use in the building trade, DIY and for general use such as packing boxes.
- Adhesives
  The huge growth in demand for grab adhesives and the technological advancements in the chemistry behind them, have resulted in an explosion of differing products. ADP Diamex is able to offer three types which are Polymer based, Water based and Hybrid Polymer based.
- Sealants
- Sealant Guns & Accessories
- Bathroom & Kitchen Sealants
Site Electrical
- Cable reels & Leads
- Transformers
- Site Lighting
Special Offers
Stihl
- Chainsaws
  If you reach for a compact STIHL chain saw to cut firewood or maintain your property, you will have just the right tool for the job. You can use these lightweight, easy to start tools to fell small trees, thin shrubs and build tree houses and pergolas as well as prepar your winter firewood. One tool - great potential.
- Head Protection
  All good things come from above, as the saying goes. But that is not always the case. In the woods or large areas of greenery, branches can swiftly find their way down, especially after a storm. To ensure your head is well protected when working with power tools, you can find a range of various comfortable helmets with intergrated face and ear protection.
- Gloves
  Our hands are our best tool. Whether you need warm winter gloves, cut-resistant gloves, waterproof or windproof gloves made of nitril to combat thorns and oil - STIHL has a wide range of high quality work gloves, with good grip and great comfort, on hand for you.
- Work Clothes
  Good work clothes have to endure a lot. So they should be robust and well made, fit well and provide benefits customised to the specific activity. STIHL's comfortable work clothes are designed to meet the toughest requirements. New for 2011, the FS 3PROTECT brushcutter trousers meet all these requirements as well as providing a well-designed general work trouser.
- Trimmer Lines
  Looking for replacement line for your mowing head? STIHL offers a wide range of trimmer lines - all made from strong polyamide plastic. It's a material which is abrasion-resistant, durably elastic and melt-proof-ensuring optimum and enduring performance. Depending on your tool's performance class and the job to be done, we can offer a choice of line profiles and thicknesses.
- Brushcutters & Strimmers
  The lawn mower has done its job and now it's time to trim round the trees, bushes, fences and flowerbeds. No problem with light STIHL brushcutters: Easy to start and easy to handle thanks to the simplified staring system, they make short work of lawn edges and small areas of grass.
- Kombi Engines
  Put four powerful engines and a variety of tools together and you have the versatile STIHL KombiSystem - for every job around the house and garden. With the STIHL KombiSystem you can replace a hedge trimmer with a bristle brush and a pol pruner with a blower. Just as you like. There are four powerful engines to suit your needs.
- Kombi Tools
  Every garden and every property is unique with its own challenges. Virtually all the jobs around the house and garden can be done with a clever combination of only a few KombiTools. Brushcutters are essential for proerties with a lot of grass. The pick tine is particularly useful if you have a lot of flower or vegetable beds and the blower makes it easier to clear fallen leaves in autumn.
- Handheld Blowers
  STIHL's high -performance blowers bring clean air to gardens, plots, parks and footpaths. It helps you to forcefully eliminate wet layers of leaves and tackles clippings, small branches and grass. The blowers ar ergonomically designed, easy to operate and a dream to start thanks to STIHL ErgoStart being a standard feature on all handheld blowers.
- Accessories
  Standard charger and Robust quick charger. Hedge Trimmer carry bag. Super Harness. Tip protector. Gutter cleaning set. Dust reducing vacuum bag. Curved flat nozzle. Vacuum adaptor kits.
- Vacuum Shredders
  STIHL Vacuum shredders are ideal for sucking up leaves and other light, loose debris out of corners, lightwells, gutters, paths & flowerbeds etc. The impeller with rotary blade compresses dry leaves to as little as 1/4 of their original volume, making the most of the capacious collection bag.
- Pole pruners
  Stand firmly on the ground and still achieve your goal. With a STIHL pole pruner you can reach up to a height of five metres, so you can thin out shrubs and prune fruit trees correctly without needing to leave the ground. Conserve your energy with one of your harnesses, which distribute the weight evenly between your back, shoulders and hips, effectively relieving the strain on you when using the tool for long periods.
- Saw chains
  We provide a vast selection of chains and can arrange for the chain to be made to measure right here in our workshop. You may order by telephone and personally collect from our showroom in Bodmin, Cornwall or we can personally deliver to the local area. Please call us on 01208 269970 for assistance.
- Guide bars
  Suitable for both the professional or occasional user, STIHL guide bars convert powerful motor performance into reliable cutting output. Carving, harvesting and firewood-cutting work is all catered for . Two basic versions are available depending on your requirements: Rollomatic and Duromatic. On Rollomatic guide bars, the saw chain runs smoothly over the bar sprocket nose. Extra-durable Duromatic solid bars are made of extremely strong steel and are particularly suitable for demanding hardwood applications. Please get in touch with us to discuss the size and model you require. You may order by telephone and personally collect from our showroom in Bodmin, Cornwall or we can personally deliver to the local area. Please call us on 01208 269970 for assistance.
- Hedge Trimmers
  Powerful, petrol-driven STIHL hedge-trimmers are reliable tools in large parks and public gardens, particularly for professionals. Low weight and excellent cutting performance are both key for shaping delicate ornamental and woody hedges. STIHL offers both - guaranteed. STIHL provide two cordless hedge trimmer models with powerful 36 V lithium-ion batteries for discerning gardeners and professionals who enjoy tending to their hedges quietly and carefully. These powerhouses deliver outstanding cutting performance due to the high stroke rate and special diamond-finished cutter blades. These impressive cordless hedge trimmers are easy to use, do not require a cable and do not give off any unwanted emissions. With STIHL electric hedge trimmers, the process is simple: plug in and get cutting! These lightweight and quiet tools are the perfect garden assistants for keeping hedges and bushes tidy. They are easy to use and offer a powerful cut. With power output of up to 650 W and different blade variants, they are more than a match for any cutting task.
- Cold Water High Pressure Cleaners
  STIHL cold water high pressure cleaners are great for making the area around your home clean and tidy as well as washing down dirty vehicles. Being versatile in use and convenient to operate, they are ideal for cleaning everything from your garden furniture, to paths and patios, and cars and bikes. With their compact design and retractable handle, they can also be easily stored in any garage or garden shed - a great tool for all home owners.
- Accessories for High Pressure Cleaners
  Accessories for the STIHL RE 98 - RE 143 PLUS high pressure cleaners.
- Vacuum Cleaners (Wet & Dry)
  With STIHL wet & dry vacuum cleaners in two different performance classes, floors can be properly cleaned - right into the tightest corners. No matter whether dry or wet - with their strong suction, these machines are ideal around the house, in the workplace or for the professional cleaning of buildings. Thanks to many practical features such as the standard quick-release coupling and washable filters, STIHL wet & dry vacuum cleaners are useful helpers both during and after work.
- Accessories for wet & dry vacuum cleaners
- Cut-off saws
  For decades, STIHL cut-off saws have been used wherever machines have been needed to cut through concrete, stone and bricks. The outstanding quality of these machines means that they are in daily use on construction sites the world over. And for good reason - they are reliable, robust and easy to maintain. As the biggest-selling brand of cut-off saws in the world STIHL are constantly improving their machines and are at the forefront of innovation, with only one thing in mind - you and your needs. As the leading manufacturer, STIHL now offers the TS 410 A and TS 420 A with elctronic water control for ideal dust suppression, making the use of your saw an even more rewarding experience.
- Accessories for Cut-off saws
- Oils
  STIHL oils have low -residue combustion, superb lubrication properties, are environmentally friendly and prevent deposit build-ups. The result is excellent protection, first-class running performance and long service life.
- Lubricants and Accessories
  All with our oils, lubricants and chemicals are formulated to help deliver the highest levels of protection against wear.
- Canisters & Accessories
  The range of STIHL canisters come in different size capacities, all of which are UN approved.
Stud Finders - Stud Sensors
Surface Polishing
Workwear & PPE
- Clothing
- Footwear
- PPE

A guide to Screws & Bolts

Head Types

Pan Head: A low disc with chamfered outer edge.

Button / Dome head: Cylindrical with a rounded top.

Round head: A dome-shaped head used for decoration.

Countersunk or flat head: Conical, with flat outer face and tapering inner face allowing it to sink into the material. The angle of the screw is measured as the full angle of the cone.

Oval or raised head: A decorative screw head with a countersunk bottom and rounded top.

Bugle head: Similar to countersunk, but there is a smooth progression from the shank to the angle of the head, similar to the bell of a bugle.

Cheese head: Disc with cylindrical outer edge, height approximately half the head diameter.

Fillister head: Cylindrical, but with a slightly convex top surface. Height to diameter ratio is larger than cheese head.

Flanged head: A flanged head can be any of the above head styles with the addition of an integrated flange at the base of the head. This eliminates the need for a flat washer.

Fasteners with a non-tapered shank

Hex Bolt: High tensile bolt part threaded.

Set Screw: A bolt that is threaded all the way to the head.

Threaded Rod / Bar: Studs or head-less screws. They may be threaded at both ends and unthreaded in the middle or completely threaded; the latter is usually referred to as a threaded rod / bar.

Eye bolt: A bolt with a looped head.

Carriage bolt (coach bolt): Has a domed or countersunk head, and the shank is topped by a short square section under the head. The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.

Roofing Bolt / Screws: A type of machine screw that has a mushroom head that is threaded to the head, they are usually made of low grade steel, have a cross head

Screw Types

Wood Screw: Generally has an unthreaded shank below the head. It is designed to attach two pieces of wood together.

Coach screw: Similar to a wood screw except that it is generally much larger bolts that are designed for securely fastening heavy timbers (timber railway trestles and bridges) to one another, or to fasten wood to masonry or concrete.

Sheet metal screw (self-tapping screw): Has sharp threads that cut into a material such as sheet metal, plastic or wood. They are sometimes notched at the tip to aid in chip removal during thread cutting. The shank is usually threaded up to the head. Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood.

Concrete screw: A carbon steel screw for fastening wood, metal, or other materials into concrete or masonry, Concrete screws are commonly blue in colour, with or without corrosion coating. They may either have a Phillips flat head or a slotted hex washer head.

Self-drilling screw (Tek screw): Similar to a sheet metal screw, but it has a drillshaped point to cut through the substrate to eliminate the need for drilling a pilot hole. Designed for use in soft steel or other metals.

Drywall screw: Specialized screw with a bugle head that is designed to attach drywall to wood or metal studs, however it is a versatile construction fastener with many uses. The diameter of drywall screw threads is larger than the shaft diameter.

Particle board screw (chipboard screw): Similar to a drywall screw except that it has a thinner shaft and provides better resistance to pull-out in particle board, while offset against a lower shear strength. The threads on particle board screws are asymmetrical.

Deck screw: Similar to drywall screw except that it has improved corrosion resistance and is generally supplied in a larger gauge. Most deck screws have a type-17 (auger type) thread cutting tip for installation into decking materials.

Double ended screw (dowel screw): Similar to a wood screw but with two pointed ends and no head, used for making hidden joints between two pieces of wood. Screw eye (eye screw): Screw with a looped head. Designed to be used as attachment point.

Mirror screws: These are flat head wood screws with a tapped hole in the head, which is designed to receive a separate screw-in chrome-plated cover.