IMPERIAL UNF 1936-1960 SOCKET HEAD CAP SCREW SELF COLOUR
SOCKET HEAD CAP SCREWS UNF S/COLOUR 1936-1960
Socket Head Cap Screws are also known as SHCS, Allen screw or Allen bolt, or simply a cap screw. 1936-1960 UNC conforming to ASME / ANSI B18.3 1986, BS 2470:1973, the contact surfaces of this screw or bolt are protected from external damage. Class Fit 3A Hardness RC38/43. Generally manufactured with a partial thread beyond a certain length and nominal diameter combination, but occasionally some stock may include a fully threaded shank at the same combination.