Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads). Diameters below 1 in.
STANDARD published on 31.1.1966
Designation standards: BS 3409-2:1966
Publication date standards: 31.1.1966
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: British technical standard
Category: Technical standards BS
Limits of size for tapped holes to accommodate wire thread inserts to provide thread sizes from No. 2 to No. 12 UNC inclusive and from No. 2 to No. 12 UNF inclusive. Recommendations for general dimensions and limits of size on the threaded portion of screwing taps intended to produce holes to the limits specified; details of a recommended gauging system for checking them. Status: Confirmed