Nfe25-511 Non Slip Ring Suzhou Ruibo Machinery and Electronics Co. Ltd Base Info Model NO.:9Type:Lock WasherMaterial:SteelCombination Washer Structure:A TypeCombination Washer Packaging:All InclusiveSpring Washer Type:Standard Description Pre:French Ground Washer DIN25201 Next:Spring Pivot Bolts (hex bolts+slotted nuts+washer+split pins+nipples)