Description
Proper valve train geometry depends on accurate rocker arm adjustment, and a quality jam nut is critical to maintaining that setting under the vibration and thermal cycles of racing or high-performance street driving. This 7/16-20 jam nut locks your rocker arm adjuster in place, preventing drift that can throw off valve timing and hurt both power and reliability. Built from steel with black oxide finish, it’s designed to withstand repeated adjustment cycles without stripping or corroding.
- 7/16-20 thread size
- 12-point head design
- Steel construction
- Black oxide finish
- Rocker arm adjusters
- Sold individually
- Bolt-on installation
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