OTTER® / ScrewFix

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OTTER® / ScrewFix Selection Guide

Timber Screw Type ID Colour Description

Bugle Phillips Head

Light Blue A self-drilling screw designed to spin into plasterboard without tearing. Needle point to pierce thin steel up to 1.00mm thick. For walls, ceilings and for most timbers.

Chipboard Phillips Head

Dark Blue A self-drilling screw with a coarse thread and nibs under the head to self-countersink itself. Thin sheet metal up to 1.00mm thick. For cabinets, decking, flooring, fresh cement sheet. Also available in Galvacoat for treated pine.

Type 17 Timber Hex Head

Red A self-drilling screw with or without neoprene sealing washer. Zinc Gold Plate or to A.S. 3566 for roofing (carports, pergolas, etc.), furniture, gates and fences. Type 17 hardened point designed to drill through thin metal, e.g. When fixing roofing profiles to timber purlins.

Particleboard Countersunk Phillips Head

Yellow Long thread screw for hinges, cabinets, kitchens, and piano hinge. Comes in three finishes, Zinc Plate, Florentine Bronze and Brass Plate. For soft timbers.

Woodscrew Phillips Head

Light Green A Phillips head woodscrew, tapered thread, for hinges, locks, brackets and angles in Zinc Plate and Brass Plate.

Button Head Needle Point Phillips Head

Light Blue Self-drilling screw for timber. Needle point to pierce thin steel up to 1.00mm. For jobs needing a low profile head. For fixing fascia bracket clips to rafters, signs, or any job requiring broad coverage. Also available with white painted head.

Bugle Batten Type 17

Red Self-drilling screw for fixing timber battens to timber rafters. In Hex Drive.

Countersunk Type 17 Phillips Head

Red Self-drilling screw for fixing metal brackets to any timbers, e.g. Timber deck, furniture, hinges, etc. T.17 point.

Pan Head Needle Point

Lemon Self-drilling screw for fixing soft boards, chipboard, plaster sheet. Needle point to pierce thin steel up to 1.00mm.
Steel Screw Type ID Colour Description

Self Tapping Screw

Orange Zinc Plate Taps its own thread as it drills its own way through thin sheet metal to thin sheet metal for screwing sheds together, etc. Available in Pan head or Countersunk head.
Pink Stainless Steel

Self Drilling Steel Hex Head

Purple A self-drilling screw with or without neoprene sealing washer. Zinc Gold Plate or to A.S 3566. Hardened point to drill through metal up to 6.00mm. For roofing, fences, gates, sheds, trailers and signs.

Self Drilling Countersunk Phillips Head

Purple A self-drilling screw with hardened point. Nibs under the head to self-countersink into predrilled timber. Also available in Galvacoat for use in treated pine.

Countersunk Wing Tip Phillips Head

Purple Designed to drill into timber to steel up to approx. 4.00mm without pre-drilling timber. For flooring, trailers, fences, gates and decking.

Wafer Head Phillips Head

Purple A low profile head for jobs requiring a broad coverage. For signs, electrical fittings, light angle. Also available in Galvacoat for use in treated pine.

Bugle Phillips Head

Purple A self-drilling screw for fixing plasterboard or plywood to steel studs up to 2.5mm approx.

Screw Components

Screw Finishes Applies to the coating of the screws. Click here for more information
Screw Thread Types Applies to the portions along the length of the screw or 'shank or thread' which has various styles depending on your application requirements see more >>
Screw Point Types Point is the at the opposite end to the head of the screw and is available in a range of different types depending on the job at hand; for more information click here >>
Screw Head Types The head type required will vary greatly depending on your application see more >>
Screw Drill Points Depending on what type of screw head is required for your job you'll need a specific drill point to assist with screwing this in: for more information click here >>


Unlike nails where you typically need a longer nail for holding power, screws can generally use shorter lengths due to the thread which has superior holding power - please check in-store with your local hardware retailer or follow your project instructions for specific screw length for your job as they can varies dependant on application; structural or cosmetic uses.

Choosing the right screw length

Finishes / Coatings

Type Application
Plain steel Manufactured using plain steel. For indoor use only, very limited applications can tend to rust easily.
Galvanized Mechanical galvanizing provides a protective sacrificial zinc coating. For external use and damp internal areas.
Zinc Plate Electroplated zinc coating (Silver in colour) For aesthetic appearance and a low level of protection against corrosion. Not for use externally.
Zinc Gold Plate A passivate is applied over the top of zinc coating to harden the surface (Gold in colour). A slightly higher level of protection against corrosion compared to plain zinc. Not recommended for use externally.
Solid Silicon Bronze A copper alloy containing tin and small amounts of silicon. Highly corrosion resistant - can be used in salt water environments. Normally used in boating applications.
Solid Stainless Steel The key benefits of stainless steel over Galvanized or other finishes are its high resistance to corrosion and the retention of the favourable stainless steel 'look'. Stainless steel is a ferrous alloy with a minimum of 10.5% Chromium content. Grades are determined by chemical structure e.g. 316 grade contains 2 - 3% Molybdenum for added corrosion resistance. Some grades such as 316 can be used in salt water environments for boating, pools and more recently in decking for long lasting and design appeal.
Brass Plate Electroplated in a solution of copper and tin For aesthetic appearance and a low level of protection against corrosion. Not for use externally. Generally only wall panel pins are bronze plated so as to blend in with the colour of the timber.
Bronze Plate Electroplated in a solution of copper and zinc. For aesthetic appearance and a low level of protection against corrosion. Not for use externally. Similar applications to the escutcheon pins/nails as in nickel plate example.

Screw Thread Types

Types   Application
Twin Fast / Fine A fine double thread with a point designed to pierce thin steel up to 1.00mm thick and hold to medium to high density timber.
Coarse Thread An open thread designed for use in soft timbers.
Split Thread A thread that runs from the screw point three quarters the way up the shank stops and resumes 10 to 15mm below the screw head. Used in roofing screws to secure the roofing material to the screw head.
Metal Thread A fine thread that taps or cuts its own thread into the metal being fixed.

Point Types

Type   Application
Needle point A fine needle-like point designed to pierce thin steel up to 1.0mm thick.
Type 17 A special long sharp point fluted to clear debris chips.
Drill Point A hardened point that self drills into metal up to 6.00mm (no pre drilling required).
Wing Tip Small metal wings positioned above the drill point that clear a passage to prevent the thread from binding in the timber.
Self Tapping Taps or cuts its own thread as it drills its way through thin sheet metal.

Head Types

Type   Application
Ribbed Countersunk Fine ribs on the tapered inner face clear away timber to allow the screw head to seat properly into timber. Not suitable for hinges or brackets.
Plain Countersunk Conical, with flat outer face and tapering inner face allowing it to sink into the material.
Pan Head Disc shaped with chamfered outer edge and flat underside.
Hex Head with Dome Seal Hexagonal shaped head with a flanged base and dome shaped neoprene seal fitted to the shank of the screw.
Hex Head Hexagonal shaped head with a flanged base.
Hex Head with Neoprene Seal Hexagonal shaped head with a flanged base and washer shaped neoprene seal fitted to the shank of the screw.
Button Head A button or dome head has flat inner face and hemispherical outer face.
Bugle Head A smooth tapered underside designed to spin into plasterboard without tearing the paper.
Wafer Head Has flat inner face and bevelled outer face.

Drive Types

Type   Application
Hex Drive A hexagonal socket drive that sits over the top of the screw head.
Inhex Drive A hexagonal shaped drive bit that slots into the hexagonal hole in the screw head.
Phillips Drive A + shaped slot and is driven by a cross-head screwdriver, designed originally in the 1930's for use with mechanical screwing machines, intentionally made so the driver will ride out, or cam out, under strain to prevent over-tightening.
Square Drive Has a square hole and is driven by a special square power-tool bit or screwdriver.
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