... -650mm 4.Finish:plain,zinc plating,passivate Feature: AISI1018 bolts socket cap head A.Product specifications1.Bolt standard: DIN912, ANSI B18 ... range inspection through the production.3. Inspection equipment: Hardness test, torque test, salt spary endurance test, mechanical sizes test, ROHS report ... right things free of charges under normal conditions. , AISI1018 bolts socket cap head