Size: M4-M16 1/4"-5/8"
Material: carbon steel, alloy steel,stainless steel
Standard: DIN931, DIN933, DIN558, DIN960, DIN601, DIN7990, BS1083, BS916, ISO4014, ISO4016,ISO4017, ISO4018,
Finishing: galvanized, black, color zinc plated, blue zinc plated