Button Head Allen Socket Screws A4 Marine Stainless Steel Bolts M3 M4 M5 M6 M8

Specs (mm) M3 M4 M5 M6. Button Head Socket Screws A4 ISO7380-1. Socket Screws. A button head socket screw is a type of fastener that features a cylindrical head with a low-profile, rounded top surface and a socket drive (hexagonal or Allen key).

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