AUTOPTIM 1/2-20 Spline Lug Nuts — 23 Pc Black Closed-End with Socket, Cold-Forged Triple-Chrome

These are 23 black closed-end 1/2-20 spline lug nuts from AUTOPTIM, supplied with a matching socket for secure, corrosion-resistant wheel fastening.

Designed as a direct aftermarket replacement, this AUTOPTIM lug nut set combines one-piece construction, cold-forged steel and a triple-chrome finish to deliver reliable clamping for compatible Jeep models and other vehicles that use 1/2"-20 threads. The kit includes 23 nuts and a socket so you can install or replace fasteners right away; dimensions and seat geometry match common tapered-wheel applications.

Will these fit my vehicle and wheels?

Check your vehicle’s factory thread spec and seat angle before buying: these nuts use a 1/2"-20 thread and a 60° tapered seat. They’re sold as an aftermarket match for many Jeep models but can fit any wheel with compatible lug bolt/stud geometry.

• Thread: 1/2"-20 (UNF)
• Seat: 60° tapered
• Hex width: 17 mm
• Length/width: 35 mm length, 20 mm outside width

How durable and corrosion-resistant are these lug nuts?

AUTOPTIM uses cold-forging and heat treatment to strengthen the single-piece nuts, then applies a triple-chrome finish to resist rust and wear. The closed-end design also helps prevent moisture and debris from entering the stud area, extending service life in harsh conditions.

• One-piece, cold-forged steel construction for crack resistance
• Heat-treated core for improved tensile strength
• Triple-chrome finish for enhanced anti-rust protection
• Closed-end profile to keep out contaminants

How do these install and what tools are needed?

Installation is straightforward using the included spline socket and a compatible torque wrench or breaker bar. The 17 mm hex interface and supplied socket make hand or shop installation possible, but final tightening should follow your vehicle manufacturer’s torque specifications.

• Supplied socket fits the included spline pattern
• Use a torque wrench for final tightening to spec
• One-piece design reduces the chance of separation during use
• Closed-end nuts require compatible stud length clearance

What does the kit include and what extras should I consider?

The package contains 23 closed-end lug nuts and one matching socket, allowing you to change all wheel fasteners plus a spare. For best results, replace damaged studs, inspect wheel seats for debris, and confirm lug torque after the first 50–100 miles.

• 23 black closed-end lug nuts
• One matching spline socket included
• Recommended: torque wrench and anti-seize if specified by wheel maker
• Inspect wheel mounting surfaces before installation

Who this is for: Drivers who need an all-in-one replacement lug nut kit for 1/2"-20 threaded studs — especially owners of compatible Jeep models or anyone swapping aftermarket wheels with a 60° tapered seat. It’s suited to DIYers wanting a ready-to-install set, professional mechanics replacing multiple fasteners at once, and vehicle owners seeking improved corrosion protection compared with basic plated nuts. AUTOPTIM also backs the product with customer support for a year, making it a practical choice when replacing worn or corroded wheel nuts.