Heat-treated 12.9 Grade High Strength Bolts for Mill Liners

Material Grade: 40Cr;

Quality Level: 12.9 Grade

Sizes: M24, M27, M30, M36, M42, M45;

Bolt-head Shape: oval head, square head, ellipse head;

Special Features:

1. The high strength bolts have been widely used in large ball mills up to dia.12-meter mills.

2. The high strength screws can be reliably used in small, middle and large cement mills, coal mils and mine mills.

3. The high strength bolts have been properly heat-treated to achieve better mechanical properties.

4. The standard bolt units include one rubber ring, concave washer, spring washer and nut.