The performance grades of ball mill bolts can be divided into , 4.8,  6.8, 10.9, 12.9, a total of 10 performance grades, of which grade 8.8 (including) and above strength bolts are medium carbon steel and alloy steel after heat treatment, these bolts are called high-strength bolts, the rest are called ordinary strength bolts.
The ball mill bolts can be divided into oval head bolts, square head bolts, tenon bolts, waist bolts, bucket bolts, D bolts, horn bolts and so on.
Ball mill bolts can be divided into: compartment liner bolts, grate plate bolts, step liner bolts, barrel bolts, fixed taper liner bolts, inlet and outlet hopper liner bolts, compartment bracket bolts, manhole bolts, grid plate bolts, end cover liner bolts