BBI® 489141 Fully Threaded Carriage Bolt, 5/8-11, 2-1/2 in L Under Head, Low Carbon Steel, A Grade

BBI® Carriage Bolt, Fully Threaded, Imperial, 5/8-11 Thread, 2-1/2 in Length Under Head, Low Carbon Steel, A Grade, Zinc CR+3, 1.344 in dia Head, 0.344 in Neck, Square Neck, 0.642 in Drive, UNC Thread, Square Drive, Material Specification: ASTM A307, Round Head.