Grade 8 (G) Flange Torque (Stover) Lock Nuts
These Grade 8 hex flange lock nuts combine a built-in washer face with an all-metal prevailing torque lock (often called a Stover nut). The distorted top threads grip the bolt and resist loosening from vibration, and the wide flange spreads the clamp load without a separate washer. They are the matching nut for Grade 8 hex flange frame bolts on trucks, trailers and heavy equipment.
Specifications
- Strength: Grade 8, all-metal prevailing torque lock
- Finish: black phosphate and oil
- Coarse thread: 1/4"-20 through 3/4"-10
- Fine thread: 1/2"-20, 5/8"-18, 3/4"-16
Common Uses
- Truck and trailer frames
- Heavy equipment and agricultural machinery
- Grade 8 hex flange bolt assemblies
FAQ
Do I need a washer with a flange lock nut?
No. The flange acts as a built-in washer and spreads the load over the surface.
Stover nut or nylon insert lock nut?
All-metal Stover nuts handle higher temperatures than nylon insert nuts and suit high-strength joints. Nylon insert nuts are easier to start by hand and work well in lower-temperature applications.
Related: Grade 8 (C) Stover Lock Nuts | Serrated Flange Lock Nuts
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