... Professinal manufacturer and exporter of Fasteners. 1Name hex head flange washer bolts 2MaterialIron,carbon steel,brass,aluminum,stainless steel3Diameter ... ,H.D.G,Nickle6Heat treatmentsoft, case harden, Grade4.8,6.8, 8.8, 10.9, 12.9, and so on.7StandardDIN ... depend on the qty17webistewww.tyfastener.com hex head flange washer bolts Process: hex head flange washer bolts Inspection: hex head flange washer ...