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BS 3409-1:1961

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

Standard Details

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.

General Information

Status : Confirmed
Standard Type: Main
Document No: BS 3409-1:1961
Document Year: 1961
Pages: 20
  • Section Volume:
  • GBM14 Manufacturing Engineering (GMB14)

Life Cycle

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Confirmed
BS 3409-1:1961
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