Pozi, Flange, Self Tapping Screws, , A Point, Zinc.
No.4, 6, 8, 10, Self Tapping Screws, Pozi, Flange Head, A Point, Zinc Plated, BS 4174
Fixaball.co.uk sells all sizes and materials of self tappers, at the best internet prices, with free delivery.
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A self-tapping screw is a screw that can tap its own hole as it is driven into the material. For hard substrates such as metal or hard plastics, the self-tapping ability is often created by cutting a gap in the continuity of the thread on the screw, generating a flute and cutting edge similar to those on a tap. Thus, whereas a regular machine screw cannot tap its own hole in a metal substrate, a self-tapping one can (within reasonable limits of substrate hardness and depth)
Self-Tapping Screw Head types
Pozidrive (pozi), Countersink (csk) Heads – Sits flush with the material surface
Pozidrive (pozi), Pan Heads – Sits proud of the material
Pozidrive (pozi), Flange Heads – Sits proud of material, spreading the load
Self-Tapping Screw Materials
We stock Zinc plated self-tapping screws for general, internal use and A2 stainless steel for improved corrosion resistance (external use).
Important Dimensions (sizes)
No.6 = screw dia. 3.5mm, head dia. 8m, head height 2.1mm.
No.8 = screw dia. 4.2mm, head dia. 9.8mm, head height 2.3mm.
No.10 = screw dia. 4.8mm, head dia. 11.2mm, head height 3mm.
No.12 = screw dia. 5.5mm, head dia. 12.8mm, head height 3mm.
All screw lengths are measured from the underside of the head.
Image is for illustrative purposes only.
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