Bolt Diameter x Bottom Neck: M12 x 66; Hardness: Shore 70°C; Swivel Part Dimensions: Tip Diameter x Tip Thickness x Height; Manufacturing Temperature: 394°F - 398°F (170°C - 180°C); Endurance Temperature: 176°F (80°C); (Normal) High Temperature Use: 30 minutes; Body: Steel; Thread Tip: Nitrile Rubber