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Screws & Fixings

Self-drilling and self-tapping screws for steel, plastics, and sheet metal — mainly Sealey assortments in common sizes. Self-drilling types cut their own pilot hole in thinner gauge material; self-tapping types need a pre-drilled hole but work in a wider range of substrates. Head choice matters: pan head for clamping, countersunk for flush finish, flanged head for bigger bearing area without a separate washer.

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Showing 1–48 of 56 results

Most assortments here are zinc-plated mild steel — fine for indoor brackets, panelling, and general assembly work. If you're fixing into stainless cladding or outdoors, match the screw grade to the base material or use stainless fixings to avoid galvanic corrosion. Black phosphate screws (the flanged-head packs) have less surface protection but lower friction during driving, useful when you're putting dozens in and don't want the driver cam-out.

Self-drilling screws work up to about 5 mm steel with a decent impact driver; thicker stock needs a pilot hole or you'll snap the point. Self-tapping screws need the right size hole — too tight and the screw snaps, too loose and it pulls out under load. DIN 7982 (countersunk Pozi) and DIN 7981 (pan head Pozi) are standard Euro profiles; thread pitch and head geometry are consistent across brands if you need to top up an assortment later. Hex head types (the 410-piece set) take a socket or spanner instead of a driver bit, which spreads torque better on larger fasteners and stops cam-out in awkward angles.

Check the pack count and size range before you buy an assortment — a 700-piece set sounds generous until you realise half of it is 3.5 × 10 mm and you actually need 4.8 × 19 mm. If you use one size constantly, individual bulk packs usually work out cheaper than topping up from mixed sets.