ASME B107.36 pdf download PLIERS: LOCKING CLAMP, AND TUBINI! PINCH-OFF 4.4 Handles Handles of pliers shall be through hardened from 30 to 50 HRC or case hardened from 75 to 86 HRlSN, with a case depth of a minimum of 0.010 in. (0.25 mm). Handles shall be so shaped as to afford a comfort- able grip and shall be free...