1.1.1 This Standard delineates the dimensional data for the inch series helical coil screw thread inserts and the threaded holes into which they are installed.Both free-running and screw-locking types having uni-fied fine and unified coarse thread series from size #1 through 1 1 ⁄ 2 in. are covered. Appendices that describe insert selection, STI (screw thread insert) taps, gages and gaging, insert installation, and removal tooling also included.
