BS EN ISO 898-1:2009
碳钢和合金钢紧固件的机械性能.具有特殊性能的螺栓,螺钉和螺柱.粗牙螺纹和细牙螺纹
Mechanical properties
of fasteners made of
carbon steel and alloy
steel
Part 1: Bolts, screws and studs with
specified property classes — Coarse
thread and fine pitch thread (ISO
898-1:2009)