Example and table with designation. Material: 88 mnv 8 ku UNI 2955-68 hardened and tempered steel with HRC hardness greater than or equal to 62, i.e. steel with equivalent or greater dimensional stability and wear resistance.
UNI 6979-1971 history
1971UNI 6979-1971 Measuring instruments. Calliper gauges, built-up type, for nominal sizes up to 10 mm.