... Torque Test per customer requirement. 1. OEM non-standard cupper nuts.1) High precision metal machining parts ... .2) Min Tolerance: +/- 0.01mm.3) Surface treatment: Black; Zinc, Nickel, ... Standard : AISI, ASTM, JIS, BS, DIN, etc Item Details:1)Material: 1215.2)Hardness: 160.3)Length: 6.8±0 ... .03mm4)Outer Dia of clinch teeth:Φ6.0. M3*0.5P5)Torque:≥12kgf.6 ...