Lug Bolt Lock Ball 12x1.5 Shank 39mm
Fitment and specs
- Thread size: 12x1.5
- Seat type: ball seat, locking style
- Shank length: 39mm, overall length: 60mm
- Hex size: 17mm
- Set of 4 lock bolts
- Fits many Mercedes-Benz, Volkswagen, and Audi applications
Run one lock in place of a standard bolt on each wheel, and start every bolt by hand to avoid cross-threading. Tighten to your vehicle's spec using our torque reference chart, then re-torque after 50 to 100 miles of driving.
Common questions
Can I use ball seat lock bolts on wheels drilled for conical seats?
No. Ball seat and conical seat hardware are not interchangeable. The seat is what centers and clamps the wheel, and a mismatched seat only contacts a thin ring of metal and can loosen over time. Match the seat shape of the bolts coming off your car.
How do I confirm 39mm is the right shank length?
Remove one of your current lug bolts and measure the threaded section below the seat. It should read 39mm, with about 60mm overall length. Matching shank length keeps thread engagement the same as your factory hardware.