This Standard delineates the dimensional data for the inch series helical coil screw thread inserts and the threaded hole into which it is installed. Both free-running and screw-locking types having unified fine and unified course thread series from size 1 through 1 1/2 inch are covered. Appendices that describe insert selection, STI (Screw Thread Insert) taps, gages, and gaging, insert installation, and removal tooling are also included. The inclusion of dimensional data in this Standard is not intended to imply that all products described are stock sizes. Consumers should consult with manufacturers concerning availability.