These Allstar Performance 5/8-18 right hand jam nuts use a thin outside diameter design that lets a smaller wrench reach the nut when adjusting radius rod or mounting hole length. With 1/2 in bolts, the same 3/4 in wrench used on the bolt can also turn the nut, so no wrench swap is needed mid-adjustment.
Nuts are steel with a zinc oxide finish. Thread size is 5/8-18 right hand, and each nut takes a 3/4 in wrench. This listing is for a package of 4.
Allstar Performance Jam Nut Spec Sheet (PDF)
Specifications
- Thread Size: 5/8-18 in
- Thread Direction: Right Hand
- Style: Thin OD
- Material: Steel
- Finish: Zinc Oxide
- Wrench Size: 3/4 in
- Quantity: Package of 4
- Part Number: ALL18292
FAQ
What thread size and direction does this jam nut have?
This jam nut has a 5/8-18 right hand thread.
What wrench size is needed for this jam nut?
A 3/4 in wrench fits this jam nut.
What material and finish are used?
This jam nut is steel with a zinc oxide finish.
How many jam nuts are included in this package?
Part number ALL18292 includes a package of 4 jam nuts.
Why does this jam nut have a thin outside diameter?
The thin OD design lets a smaller wrench reach the nut, so the same wrench used on a 1/2 in bolt can also turn this jam nut during radius rod or mounting hole adjustments.

