- Can be used either top up or top down
- Can be identified by indentations on the outside which distorts the internal threads to increase resistance on the mating part
- Available in UNC coarse or UNF fine thread
- Also referred to as two way lock nuts or center lock nuts, which are a kind of distorted thread locknut
- Comes in CR+3 Zinc Plated Low Carbon Steel
Zinc Plated Steel Two Way Reversible Lock Nut
