This Standard covers the complete general, dimen-sional, mechanical, and performance requirements (proof load, prevailing torque, and torque-tension) for carbon steel, inch series nylon insert locknuts of grades N2, N5, and N8 in styles NE ( 1 ⁄ 4 in. to 1 1 ⁄ 2 in.),NTE ( 1 ⁄ 4 in. to 1 1 ⁄ 2 in.), NU ( 1 ⁄ 4 in. to 3 in.), NTU ( 1 ⁄ 4 in. to 3 in.), NM (#2 to #12), NTM (#2 to #12), and hex flange ( 1 ⁄ 4 in. to 3 ⁄ 4 in.). This Standard also includes all-metal hex (#4 to 1 1 ⁄ 2 in.) and hex flange ( 1 ⁄ 4 in. to 3 ⁄ 4 in.) locking nuts of grades A, B, C, F, and G. These nut designs are designated as American National Standards.
