ASTM A320 L7M Stud bolt HDG Hot Dip Galvanized
ASTM A320 L7M Stud bolt HDG Hot Dip Glavanized Hext nuts manufacturer in China Standard: ANSI/ASME B 18.31.2,DIN975/DIN976, Diameter: 1/4"-5",M6-M125 Length: ≤9m or 30feet Material: ASTM A320 L7M stud bolt