FLYCLE M14x1.5 Spline Lug Nuts 32pc — Black 2" Tall Closed-End, 60° Conical Seat, Includes Spline Key

FLYCLE M14x1.5 32-piece black spline lug nut set is a 2-inch tall, closed-end conical-seat wheel fastener kit that includes one spline key socket for secure installation on compatible 8-lug truck wheels.

If you drive a heavy-duty truck or tow frequently, the right lug nuts can mean the difference between a safe wheel fit and premature wear. This FLYCLE kit supplies thirty-two heat-treated SCM435 steel lug nuts finished in a black corrosion-resistant coating, each machined to a 14mm x 1.5 pitch and a 60° conical seat. The closed-end design prevents dirt and moisture from entering the stud area, while the included spline key socket lets you install or remove the nuts without exposing traditional hex points.

How do these lug nuts match my vehicle and wheels?

These lug nuts are built specifically for wheels that accept a 60° conical seat and studs with 14mm x 1.5 threads. They will not fit wheels designed for mag, ball, or rounded seats. Confirm your wheel’s seat type and stud thread before purchasing to ensure proper fitment and safety.

• Thread size: 14mm x 1.5 pitch
• Seat type: 60° conical (not compatible with mag/ball/round seats)
• Length: 2.0 inches (50.8 mm) for deeper engagement
• Width at top: 0.9 inches (23 mm)

What materials and processes make these lug nuts durable?

FLYCLE lug nuts are cold-forged from SCM435 alloy steel and receive additional heat treatment to increase tensile strength and wear resistance. Precise machining ensures consistent threads, and a protective finish reduces corrosion and keeps the black appearance longer under road conditions.

• Base metal: SCM435 cold-forged steel
• Heat treatment for improved toughness
• Precision-thread machining for repeatable fit
• Special coating for corrosion resistance and appearance

How do I install and use the included spline key socket?

The supplied spline key is designed to engage the spline pattern on each lug nut for secure tightening and removal. Use a torque wrench with the socket to achieve the manufacturer-recommended torque for your vehicle’s wheels. Keep the socket available for future maintenance and store a spare in your toolbox for roadside needs.

• Includes one spline key socket compatible with all 32 lug nuts
• Use with a compatible torque wrench for correct clamp load
• Store the socket in a safe place to avoid loss
• Closed-end nuts protect studs from contaminants during use

Will these lug nuts affect wheel clearance or hub components?

The 2-inch height provides additional thread engagement, which can be useful on aftermarket wheels with deeper lug holes. However, always check backspacing and hub clearance to ensure the taller profile won't interfere with wheel covers, hubcaps, or brake components. The 0.9-inch hex width is compact but offers enough surface for the spline drive system.

• 2.0" length increases stud engagement for deep lug holes
• 0.9" top width balances compact fit and drive strength
• Closed end helps maintain stud integrity and reduces corrosion
• Confirm clearance with wheel accessories and brake parts

Who is this for? This FLYCLE M14x1.5 32-piece set is aimed at owners of 8-lug full-size trucks and heavy-duty SUVs—models like Silverado, Suburban, Express, Sierra, and Ram 2500/3500—who need durable, corrosion-resistant lug nuts for aftermarket wheels with a 60° conical seat. If you require long thread engagement, a clean closed-end finish, and the security of a spline key system, this kit is designed for your maintenance and upgrade needs. FLYCLE backs the set with 12 months of after-sales support and technical help if you have questions about installation or fitment.