SS sharp nut cap Dia:Min 2mm Surface :BO SGS audited More than 20 ... field 1,Name:SS sharp nut cap;SS nut cap;Sharp nut cap 2,For the similar nut cap,what can we do ?(1 ... ), Ability for the material of this kind of nut cap: Grade3.6,4.6,4.8,5.6,6.8 ... ,9.8,10.9,12.9,etcCarbon steelGr.B,Gr.C,Gr.D,Gr.36,Gr.58,1010,1015,1016,1020 ... hardware fastener ,especially the cutting/turning parts. SS sharp nut cap