Product Description:Name : Pull StudModel Number : BT30 BT40 BT50 (BT30- M12,BT40-M16,BT50-M24)Degree : 90°Material: 40/20CrMiTnHardness: 46-50HRC/55-58HRCAccuracy: 0.02/0.01Features: The low-carbon alloy steel is used for thread processing after quenching. The shank has high hardness, wear resistance, long service life, and the hardness of the pull stud surface to the core gradually decreases, with strong impact resistance and accurate size.Applicable equipment: suitable for high-speed machines such as CNC machining centers, engraving machines, and engraving machines.Package Include:According to your choose!