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BSI BS 3409-1:1961

Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) -- Diameters ¼ in and over
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BSI BS 3409-1:1961

Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) -- Diameters ¼ in and over

PUBLISH DATE 1961
PAGES 28
BSI BS 3409-1:1961

This British Standard comprises three sections:

Section 1, which specifies limits of size for tapped holes to accommodate wire thread inserts to provide thread sizes from 1/4 in to 11/2 in UNC inclusive and from 1/4 in to 1 in UNF inclusive;

Section 2, which recommends screwing taps intended to produce holes to the limits of size specified in Section 1;

Section 3, which gives a recommended gauging system for checking the tapped holes.

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.
SDO BSI: British Standards Institution
Document Number 3409-1
Publication Date Aug. 16, 1961
Language en - English
Page Count 28
Revision Level
Supercedes
Committee FME/9
Publish Date Document Id Type View
Aug. 16, 1961 BS 3409-1:1961 Revision