Help · Finder
Lug Nut Finder
Match a lug nut to your studs and wheels by thread size, seat, style and hex, with the spline key when one is needed.
Match Your Lug Nut
Start with the thread size and the seat. Those two must match your studs and wheels. Style and hex are up to you.
From your vehicle maker's spec or a thread pitch gauge. See below.
Seat
Style
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Read the Thread Size
Metric: M12x1.50
12 mm stud diameter, 1.5 mm from one thread to the next. M12x1.25 and M12x1.50 look alike but do not interchange.
Inch: 1/2-20
1/2 in stud diameter with 20 threads per inch, common on trailers and many older domestic vehicles.
Not sure? Use a gauge
Hold thread pitch gauge leaves against the stud until one sits flat with no gaps, and measure the diameter with calipers.
Match the Seat to the Wheel
The seat is the part of the nut that clamps the wheel. It has to match the shape of the wheel's lug hole, including the cone angle (60 or 90 degrees), or the nut cannot hold torque. Never mix seat types on one wheel.
The most common seat on steel and many alloy wheels. Truck stud piloted wheels can use 90 degree cones.
Flat seats with a flange, like the two piece flange nuts on hub piloted heavy truck wheels.
A shank that fits into the lug hole and a flat washer on the wheel face. The shank has to suit the wheel.
Ball (radius) seats are rounded and do not interchange with conical seats. We don't stock them online, so call if your wheels take them.
Next: torque them right
Star pattern, stages and re-torque intervals in our How to Torque Lug Nuts guide. Questions? Call 800-328-7400.
- Sources: Dexter Axle Product Bulletin #409, Wheel Attachment and Torque Requirements (match fasteners to the wheel's cone angle); our product data for thread, hex, style and seat.