BS 3172-2:1980
Date published:
Screw threads for spectacle frames, Specification for screw threads (metric series) for spectacle frames
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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Related Information
11.040.70 Ophthalmic equipment
21.040.10 Metric screw threads
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BS 3172-2:1980
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