BS 3409-2:1966
$86.31
Specification for the tapping of holes to receive wire thread inserts (UNC and UNF threads) – Diameters below ¼ in
| Published By | Publication Date | Number of Pages |
| BSI | 1966 | 14 |
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 No. 2 to No. 12 UNC and UNF;
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.
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.
