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Recommendations for tapping drill sizes for use with fluted taps.
STANDARD published on 30.9.1975
Designation standards: BS 1157:1975
Publication date standards: 30.9.1975
SKU: NS-58838
The number of pages: 28
Approximate weight : 84 g (0.19 lbs)
Country: British technical standard
Category: Technical standards BS
Sizes for ISO internal metric threads to BS 3643 (Parts 1, 2 and 3) and for internal threads to BS 21, 84, 93, 1580 (Parts 1, 2 and 3) and 2779. Alternative sizes in appendix. Status: Confirmed
28.7.1972
31.10.1983
30.12.1983
29.7.1983
WITHDRAWN
15.7.1992
WITHDRAWN
15.7.1992
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