Lock nuts are available in a lot of different styles, grades, and finishes. As the name indicates, lock nuts cannot be removed once they are fixed. In contrast, we can remove most locknuts and in fact some can be reused if they are correctly removed. Lock nuts come in ASTM A194 Grade 2H as well as ASTM A563 Grades A & DH.

At BBI, we manufacture lock nuts using standard hex or heavy hex pattern. Tri-Lok and Anco tend to be the most commonly used style of lock nuts. Anco style is a self-locking nut that comes with a stainless steel ratchet pin. Once the nut is spun onto the bolt, the pin slides along the threads, eventually preventing the nut from pulling back. Well, the key benefit of using Anco style nuts is that we can bend the ratchet pin in a way that it becomes easy to remove the nut if need arises. Tri-Lok style tends to be the “prevailing-torque” lock nut which acts frictionally resistant to rotation due to thread distortion on the top thread of the nut.
Contact us today for more details on various other types of lock nuts and discuss with our specialized estimators.

Finished Hex Dimensions

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Heavy Hex Dimensions

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