One less thing to come loose is enough of a reason to check out these simple locking bolts. Each Proform Grade 8 Collector Bolt and Nut combo includes two pairs of special locking washers.
When the combo is torqued to 28+ ft.-lbs., the washers’ super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the flange. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams.
Vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. Proform Collector Bolts can be untightened with a normal wrench, lubricated, and reused.
- Resists vibrating loose
- Super-hard cam-locking washers
- No little clips or retainers to handle
- Oil actually improves performance
- Economical and reusable