BS 1157:1975
Current
Date published:
Recommendations for tapping drill sizes for use with fluted taps
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.
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BS 1157:1975
Get this standard
Prices exclude GST
PDF
( Single user document)
$404.35 NZD
HardCopy
$443.48 NZD