China Square Nut factory Details锛?/span> Name:Square nut Standard:DIN557 Size:M4-M16 Material:Carbon steel/stainless steel Coating:Zp, Yzp, HDG, Geomet, Black, Self colour Grade:GR4, GR8 Delivery time:Usually about 45days Certification:EN10204: 3.1 Report Introduction锛?/span> That DIN557 square nut is a four-sided nut that can be used in a channel or welded into place. It have a more...