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Homepage>BS Standards>25 MANUFACTURING ENGINEERING>25.100 Cutting tools>25.100.50 Taps and threading dies>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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immediate downloadReleased: 1961-08-16
BS 3409-1:1961 Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) Diameters ¼ in and over

BS 3409-1:1961

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

CURRENCY
LANGUAGE
English
Standard number:BS 3409-1:1961
Pages:20
Released:1961-08-16
ISBN:0 580 35252 8
Status:Standard
DESCRIPTION
This standard BS 3409-1:1961 Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) is classified in these ICS categories:
  • 25.100.50 Taps and threading dies

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.
This product includes: