Flat Washer Sems

Description: Flat Washer Sems

Type: sems screw

Materials: Steel , stainless steel A2/A4,304

Surface treatment: zinc plated, black oxide, hot dip galvanized, passivated

Head Type: Socket Countersunk head, pan head, hex washer head

Standard: ASME B18.13 / ASME B18.13.1M

Certificate：Material Chemical Certificate, Inspection Report