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.
BS 3172-2:1980
Original price was: $264.16.$132.00Current price is: $132.00.
Screw threads for spectacle frames-Specification for screw threads (metric series) for spectacle frames
BSI Group , 09/30/1980
