BS 3409-1:1961
Current
Date published:
Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads), Diameters ¼ in and over
Specifies limits of size for tapped holes to accommodate wire thread inserts to provide thread sizes from ¼ in to 1½ in UNC inclusive and from ¼ in to 1 in UNF inclusive. It includes recommendations for general dimensions and limits of size on the threaded portion of screwing taps intended to produce holes to the limits specified, together with details of a recommended gauging system for checking them.
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25.100.50 Taps and threading dies
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BS 3409-1:1961
Get this standard
Prices exclude GST
PDF
( Single user document)
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