spring nut Material:A2,A3,A4,AL,Copper Finish:Zinc,Black,Hdg etc Size:M2-M72... spring Nut1.Standard:DIN,ISO,AS,NF,JIS,BS,ASTM ... ,SFS,GB,NON-STANDARD etc2.Material:Carbon steel,A2,A3,A4,Copper ... to contact us. cyfasteners'at'hotmail'dot'com N-08 spring nut