Spring nut 1.Nut size:M4-M20 2.Nut material:Stainless ... :ZP, BZP, HDG 4.Effect:fastening Stainless steel spring nutProducts Details: Products Name: Spring nut Size: M4-M20 Material: Carbon steel,Stainless ... ://www.wzhowl.comFax:0086-577-86001620Postal Code:325001 Stainless steel spring nut