A65423: Round Head Square Neck Bolt, M16 X 230Round Head Square Neck Bolt designed for secure fastening in various construction and machinery applications. Features a 35 mm (1 3 8 in) diameter head, 16 mm (5 8 in) thread size, and 230 mm (9. 06 in) length for robust performance. Includes an 8. 90 mm (0. 35 in) head thickness, 2 mm (0. 08 in) thread pitch, and 8. 45 mm (0. 33 in) neck depth for precise fitting. Made from high quality general steel for durability and strength. Heat treated and