In brief, most RAM 1500 trucks use M14 x 1.5 lug nuts with a 60-degree conical seat and typically a 22 mm (7/8 inch) hex; verify the exact spec for your year and wheels to be sure.
Factory-standard lug nut specs
The following details cover the common configuration used on RAM 1500 factory wheels, including thread size, seat type and the typical socket size you’ll need for maintenance and replacements.
Seat type and socket size
The standard RAM lug nuts for many 1500s employ a 60-degree conical (cone) seat and are typically tightened with a 22 mm (7/8 in) socket. This is the most common pairing for factory aluminum wheels up through recent model years.
- M14 x 1.5 thread size
- 60-degree conical seating
- 5 on 139.7 mm bolt pattern (5x139.7)
- 22 mm (7/8 in) across-flats hex size
- Typically used with factory aluminum wheels up to approximately 22 inches
Note: If your RAM uses aftermarket wheels or a different year, the lug nut size and seat type may vary. Always verify against the wheel manufacturer’s specs or the vehicle’s manual.
How to verify your lug nut size on a RAM 1500
To confirm the correct lug nut size for your vehicle, use these checks before purchasing or reinstalling wheels.
Verification checklist
These steps help ensure you select the correct fasteners for your RAM’s wheels and hub:
- Check the owner’s manual or the wheel manufacturer’s specification for the exact lug nut size, thread pitch, and seat type.
- Look at your existing lug nuts for markings that indicate the thread size (for example, M14 x 1.5) and seat style.
- Measure the stud diameter with calipers to confirm whether you have M14 (about 14 mm) or another size.
- Identify the seat type (60-degree conical is typical for RAMs) and compare to any aftermarket wheel requirements.
- If you’re replacing wheels, ensure the lug nuts you buy are compatible with both the wheel and the RAM hub.
If you are unsure, contact RAM support or a professional tire and wheel shop to avoid cross-threading or seating issues that could affect safety.
Summary
The standard configuration for most RAM 1500 lug nuts is M14 x 1.5 with a 60-degree conical seat, using a 22 mm (7/8 inch) hex. This applies to many factory wheels up through recent model years, but aftermarket wheels or certain trims may use different sizes. Always verify with the wheel manufacturer or the vehicle manual before purchasing replacements.