GB/T 9074.18-2017
开槽盘头自攻螺钉和平垫组合C型
Slotted pan head tapping screws and plain washer assemblies-type C
GB/T 9074.18-2017
开槽盘头自攻螺钉和平垫组合F型
Slotted pan head tapping screws and plain washer assemblies-type F
GB/T 9074.18-2002
开槽盘头自攻螺钉和平垫组合C型
Slotted pan head tapping screws and plain washer assemblies-type C