2 1/2"-4 UNC IMPERIAL SOCKET HEAD CAP SCREW SOCKET SHOULDER SCREWS UNC ALLOY SELF COLOUR Â Class Fit 3A Hardness

 Class Fit 3A Hardness RC38/43

Thread height is approximately 0

only apply to metric Grade 12

THREAD PITCH 1

Shoulder tolerances in microns +0 / - 18

2 1/2"-4 UNC IMPERIAL SOCKET HEAD CAP SCREW SOCKET SHOULDER SCREWS UNC ALLOY SELF COLOUR Â Class Fit 3A HardnessIMPERIAL SOCKET HEAD CAP SCREW UNC SELF COLOUR 1936 1960 Socket Head Cap Screws are also known as SHCS, Allen screw or Allen bolt, or simply a cap screw. The contact surfaces of this screw or bolt are protected from external damage. 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. Specification: Conforming to