... years experience in special fastener Name: hex nut with internal thread and castle screw Ability for the material of this ... 8,5.6,6.8,8.8,9.8,10.9,12.9,etcCarbon steelGr.B,Gr.C,Gr ... while,colour,dacroment),Nickel plated,copper plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic oxidation,etc Dip plating ... own way to supply youthe high quality products with lowest price and delivery on time as we can.We ...