Name: Spring washer Type : Fe6 /ULS6/ULS7.. Raw material : 65Mn./ 0Si2Mn/Q235/45# ... samplesRaw material : 65Mn./ 0Si2Mn/Q235/45#Surface :black etc. Commodity:Spring washersType:from 3/4-1Raw material:65Mn, 60SizMn, 70#...Surface ... ,t-bolt,rail bolt,fish bolt,square bolt,special bolt5,nuts and spring washers6.tie plate,base plate,rail plate7.fish plate ...