... :8.8,10.9,12.9 4Material:Q235,45#,4Cr Rail fastener high strength structural steel nut bolt I. Item:High ... strength bolts for steel structuresII. Specification: DIN 6914, DIN 6916, DIN 7990, DIN ... products 4.Factory view figurespackagingfactory viewTesting equipmentsWorkshop Welcome your visit! Rail fastener high strength structural steel nut bolt