1000 Assorted Self-Tapping Screws | Pan-Head and Countersunk-Head | No.4, No.6, No.8 and No.10 | A2-70 Stainless Steel

Self tapping screws are normally used with sheet metal and plastics. This a selection of both countersunk-head AKA flat-head and pan-head , both with a pozi-drive (cross-recessed.) As the name suggests, this type of screw forms its own thread as it is installed into a pre-drilled hole. Not to be confused with self drilling screws, the main difference is that self-tapping screws cannot go through metal without a pilot hole, which must be pre-drilled or pre-punched. Self-tappers are good for use with metals, various types of plastics (plywood, fiberglass, polycarbonates), and cast or forged material, like iron, aluminium, brass or bronze. Self-tapping screws also work for surfaces where you can’t secure the rear end with a nut. Common applications include fastening aluminium sections, attaching metal brackets onto wood, or inserting screws into plastic housings. This set contains a selection of  of No.4, No.6 and No.8 (3.5mm, 4.2mm & 4.8mm thread diameter) screws. A2-70 stainless steel, also known as 304 or 18/8 grade  has great weather resistance and longevity. It can be used in all outdoor conditions apart from where consistent exposure to either salt water or sewerage is expected.