AUTOPTIM M14x1.5 Spline Lug Nuts 32pc - Long 2" Black Closed-End, Security Socket Included

These AUTOPTIM M14 x 1.5 spline lug nuts are a 32-piece, one-piece steel set with a security spline design and included socket, built to fit many heavy-duty truck wheels and resist rust.

If you need a complete wheel-lug replacement kit for heavy-duty trucks, this AUTOPTIM set supplies long, closed-end acorn lug nuts that match M14 x 1.5 threads and a 60° seat. The nuts are cold-forged, heat-treated steel with a corrosion-resistant finish and include a dedicated splined socket key to deter theft and ensure correct tightening.

Will these lug nuts fit my truck model?

They are specified for many heavy-duty pickups and HD trucks that use M14 x 1.5 threads and a 60° acorn seat. Always check your vehicle's original lug nut seat and thread pitch before ordering to confirm compatibility.

• Thread: M14 x 1.5
• Seat: 60° acorn (bulge/closed end)
• Length: 2" (50 mm); hex: 3/4" (19 mm)
• Included: 32 lug nuts + one splined socket key

How secure and theft-resistant are these spline lug nuts?

These are one-piece, splined lug nuts with a seven-spline safety pattern that requires the supplied socket key to properly torque them. The one-piece construction is more stable than two-piece designs and reduces the risk of loosening or accidental separation.

• One-piece solid construction for stability
• 7-spline safety pattern prevents standard wrenches from fitting
• Supplied socket key is required for proper installation and removal

How durable and corrosion-resistant is the finish?

Manufactured from cold-forged, heat-treated steel, these lug nuts are engineered for strength under heavy loads. A chrome plating improves resistance to rust and corrosion; the finish has passed standardized salt spray testing to extend service life in harsh conditions.

• Cold-forged, heat-treated steel core for high strength
• Chrome-plated surface for improved rust resistance
• Salt spray tested to help withstand corrosive environments

How easy is installation and what tools come with the kit?

The set arrives with a dedicated splined socket key sized to the lug nuts, so you have the specialty tool needed for secure fitting. Use a torque wrench set to the vehicle manufacturer's wheel torque spec to avoid overtightening; do not rely on the socket alone for final torque.

• 32 lug nuts plus one splined socket included
• Use with a torque wrench to manufacturer torque specs
• Closed-end design helps protect studs and threads from debris

Who this is for: This AUTOPTIM M14 x 1.5 spline lug nut set is intended for owners and technicians of heavy-duty trucks — including RAM 2500/3500, GMC Sierra 2500/3500 HD, Chevy Silverado 1500/2500/3500 HD, and Ford F250/F350 Super Duty models that share the M14 x 1.5 thread and 60° acorn seat. It suits fleet managers, off-road operators, and any driver who wants a durable, theft-resistant one-piece lug nut upgrade. Remember to confirm your vehicle's lug nut seat type and thread pitch before purchase; contact AUTOPTIM customer service for fitment guidance or if you need assistance during installation.