Welding Stud Bolts size M8 x Length 20mm - 50,000 pcs Welding Stud Bolts size M6 x Length 25mm - 40,000 pcs Welding Stud Bolts size M4 x Length 40mm - 18,000 pcs Welding Stud Bolts size M3 x Length 40mm - 13,250 pcs Material: Mild Steel Full Threaded