Wheel Mate Muteki Open End Lug Nuts - Chrome 12x1.50

Cold-Forged Chrome Lug Nuts Built for Tuner Wheels and Performance Installs

The Wheel Mate Muteki 31886C open end lug nuts bring racing-inspired engineering to your wheel swap or upgrade. Cold-forged from 1008 steel, each nut is smaller and lighter than a standard lug nut while maintaining the strength needed for street and track use. The open-ended design accommodates longer aftermarket studs for full thread engagement, and the 60-degree taper seat provides a firm, secure lock against the wheel hub. A spline drive socket design adds a layer of theft resistance since these cannot be removed with a standard lug wrench. The 31886C is an ideal choice for tuner-style wheels with small lug holes and vehicles with 12x1.50 studs.

Key Features

• Cold-forged 1008 steel construction for high strength at reduced weight
• Open-ended design accommodates extended racing studs and ensures full thread engagement
• Oversized 60-degree taper seat for secure wheel-to-hub contact
• Spline drive socket head adds theft deterrence
• Compact 20mm x 21mm head fits tuner wheels with small lug holes
• Lightweight at 25 grams per nut versus the typical 60 grams
• Thread pitch M12x1.50 compatible with Honda, Acura, Toyota, Lexus, Mazda, and Mitsubishi
• Chrome finish for a clean, polished appearance on any wheel

Specifications

What's Included

• 20 x Muteki 31886C open end lug nuts in chrome finish
• 1 x Spline socket key adapter for installation and removal

Frequently Asked Questions

The 31886C uses an M12 x 1.50 thread pitch. This is a common fitment for Japanese domestic market and Japanese-spec vehicles including Honda, Acura, Toyota, Lexus, Mazda, and Mitsubishi models. Always confirm the stud thread pitch on your vehicle before purchasing.

The 31886C uses a 60-degree conical taper seat. This is one of the most common aftermarket lug nut seat types and is designed to work with aftermarket wheels that have a tapered lug seat. Using the wrong seat type can prevent proper seating and create a dangerous condition. Always match the seat type to your specific wheel before installing.

The Muteki 31886C uses a spline drive head that cannot be turned with a standard hex socket or lug wrench. The included spline key adapter is required for installation and removal. Keep this key in your vehicle at all times so you can remove the wheels if needed on the road or at a shop.

Yes. One of the primary advantages of the 31886C design is the compact 20mm outer head diameter, which is significantly narrower than standard lug nuts. This makes it compatible with most tuner-style aftermarket wheels that use small counterbore lug holes where a standard socket or lug nut head would not fit.

Yes. The 31886C is cold-forged 1008 steel and designed for both street and performance use. The 60-degree taper seat provides solid clamping force against the wheel hub when torqued correctly. Always torque to the vehicle manufacturer's recommended specification for M12 studs (typically 75 to 85 ft-lbs as a general guideline) and re-torque after the first 50 to 100 miles following any wheel installation.

M12 x 1.50 is the standard stud thread pitch for many Honda, Acura, Toyota, Lexus, Mazda, and Mitsubishi vehicles. Common applications include the Honda Civic, Honda Accord, Toyota Corolla, Toyota Camry, Mazda3, and Mitsubishi Lancer. Always verify the thread pitch and seat type specific to your vehicle and aftermarket wheel before ordering.

Yes. The open-ended design means the nut does not have a closed cap on the top. This allows the stud to protrude through the nut completely, which is important when using extended aftermarket wheel studs or hubcentric rings that alter the effective stud length. It also ensures full thread engagement on studs of varying lengths.

You need the included spline socket key adapter and a standard torque wrench or impact wrench. The spline key fits into a 1/2-inch drive or 3/8-inch drive socket. Most professional shops can also accommodate the spline key when you bring it in. Do not attempt to install or remove with a standard hex socket as this will damage the nut head.

Installation Instructions

1. Confirm the thread pitch on your vehicle's wheel studs matches M12 x 1.50 before installation.
2. Verify that your aftermarket wheel uses a 60-degree conical taper lug seat compatible with the 31886C.
3. Clean the wheel stud threads and the lug nut threads to remove any debris, rust, or old thread compound.
4. Do not apply anti-seize or thread locking compound to the studs unless specifically required by your wheel manufacturer.
5. Thread each lug nut onto the stud by hand until fully seated against the wheel using the included spline socket key.
6. Using a torque wrench with the spline socket key adapter, torque each lug nut in a star pattern to the vehicle manufacturer's specification for M12 studs.
7. After driving 50 to 100 miles, re-torque all lug nuts to confirm they have not loosened.
8. Store the spline socket key in your vehicle in case roadside removal is needed.

WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.