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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
    Edition: 1961
    $316.70
    / user per year

Description of BS 3409-1:1961 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.

Standard NumberBS 3409-1:1961
TitleSpecification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) - Diameters ¼ in and over
StatusConfirmed
Publication Date1961-08-16
DescriptorsScrew-cutting tools, Thread inserts, Gauges, Tapping (threads), Fits, Unified screw threads, Threads, Holes, Wires, Dimensions, Diameter
ICS25.100.50 Taps and threading dies
CommitteeFME/9
ISBN0 580 35252 8
PublisherBSI
Pages20

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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