What is the thread pitch of the lug nuts on a 2017 Ram 1500?
The lug nuts on a 2017 Ram 1500 typically use a 1/2-20 UNF thread pitch (1/2 inch diameter, 20 threads per inch), usually paired with a 60-degree conical seat. This is the standard factory specification for most Ram 1500 wheels, though aftermarket wheels may use different fasteners.
In this article, we explain the thread pitch in plain terms, note the common variations you might encounter, and share practical tips for verifying the correct lug nut size for your vehicle and wheels. If you’re outfitting aftermarket wheels or replacing worn nuts, confirming the exact size is essential for safe mounting.
What the thread pitch means for your Ram
Thread pitch describes how tightly the threads are spaced along a bolt or nut. For automotive lug nuts, this is defined by both diameter and threads-per-inch or by metric equivalents. The Ram 1500’s stock lug nuts are 1/2 inch in diameter with 20 threads per inch, designated as 1/2-20 UNF. This is a fine-thread standard and is commonly used with a 60-degree conical seat on stock wheels.
Using the correct thread pitch is crucial for proper engagement with the wheel studs. Using a lug nut with the wrong pitch can damage threads or fail to secure the wheel. If you’re dealing with aftermarket wheels or replacements, always confirm the exact specification with the wheel manufacturer or your Ram dealer.
Common lug nut thread pitches you might encounter
Below are common lug nut thread pitch options you may encounter in the market. The Ram 1500’s stock configuration is 1/2-20 UNF, but aftermarket wheels can require different sizes. Verify against your wheel manufacturer’s specifications before purchase.
- 1/2-20 UNF — standard for many 2017 Ram 1500 trucks; 1/2 inch diameter with 20 threads per inch; typically paired with a 60-degree conical seat.
- 9/16-18 UNC — larger-diameter studs/nuts used on some trucks or certain aftermarket configurations.
- M12x1.5 — metric alternative found on some imports or specific aftermarket wheels; not standard for the 2017 Ram 1500 stock setup.
In practice, rely on the stock specification unless your wheels explicitly require a different fastener. For most owners, the 1/2-20 UNF lug nuts with a 60° conical seat will be correct.
How to verify the lug nut thread pitch on your vehicle
To ensure you’re using the correct lugs, verify using these methods:
- Check the owner’s manual or Ram service manual for wheel and lug nut specifications.
- Inspect the lug nuts or wheel studs for stamping that indicates size (some nuts are stamped with "1/2-20" or similar markings).
- Measure or compare the lug nut thread pitch with a thread gauge or by trying a known correct lug nut size from a trusted source.
When in doubt, contact a Ram dealer or the wheel manufacturer to confirm the exact thread pitch for your specific wheel configuration.
Summary
The standard lug nuts on a 2017 Ram 1500 use a 1/2-20 UNF thread pitch (1/2 inch diameter, 20 threads per inch) with a 60-degree conical seat. This is typical for stock wheels, but aftermarket wheels may require different fasteners. Always verify with official sources or the wheel manufacturer before purchasing or installing lug nuts.
