... in special fastener Name: hex nut with internal thread and castle screw Ability for the material of ... this kind of nut: Grade3.6,4.6,4.8,5.6,6.8,8.8,9.8 ... ,spray coating,electrophoretic coating,etc Polishing Grinding and polishing,etc,except mirror finishAbility for the ... to supply youthe high quality products with lowest price and delivery on time as we can. ...