BS 3172-2:1980
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Screw threads for spectacle frames Specification for screw threads (metric series) for spectacle frames
Hardcopy
07-23-2013
English
09-30-1980
ISO metric screw threads, provision being made for nominal sizes S 0.8 x 0.20, M 1.0 x 0.25, M 1.2 x 0.25, M 1.4 x 0.30 and M 1.6 x 0.35 and for related taps and gauges. Appendix A gives recommendations for gauging practice.
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