Allstar Performance 1/2-20 Left Hand Thread steel jam nuts lock rod ends and threaded suspension components in place, preventing them from backing off under vibration and load. This listing is for a package of 50.
- Thread Size: 1/2-20 in
- Thread Direction: Left Hand
- Wrench Size: 3/4 in
- Material: Steel
- Finish: Zinc Oxide
- Quantity: Set of 50
- Part Number: ALL18259-50
Allstar Performance Jam Nut Spec Sheet (PDF)
FAQ
What thread size does this jam nut fit?
This jam nut is machined for 1/2-20 left hand threads, matching 1/2-20 left hand threaded studs, bolts, and rod ends.
What wrench size fits this jam nut?
The hex flats measure 3/4 inch across, so a 3/4 inch wrench or socket fits this jam nut.
What material and finish does this jam nut use?
This jam nut is machined from steel with a zinc oxide finish for corrosion resistance.
How many jam nuts are included in this listing?
This listing includes a package of 50 Allstar Performance part number ALL18259-50.
What is a jam nut used for?
A jam nut threads onto a bolt, stud, or rod end and is tightened against a second nut or fixed point to lock the assembly in place, preventing it from loosening under vibration. This is common on suspension tubes and rack-and-pinion steering linkages.

