Common specifications of screws


A: Metric screw B: American screw C: English screw

A: Metric mechanical screw: Metric

Ex: M3 x 6 – P P B: M3 machine screw, 6mm long, cross, round flat head, black plated

Finish Code: appearance treatment specification

Head Code: Head shape.

Screw head shape. Cylindrical head. Semi countersunk head. Countersunk head. Spherical cylindrical head. Pan head. Half round head. Hexagon head.

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