AUTOPTIM M12x1.5 ATV Lug Nuts — 16pc Black Closed-End, 3/4" (19mm) Hex, 60° Tapered

AUTOPTIM M12x1.5 ATV lug nuts are a set of 16 closed-end, one-piece black conical nuts designed to replace OEM M12x1.5 fasteners on compatible UTVs and ATVs, delivering corrosion resistance and a precise fit.

These lug nuts are engineered for utility vehicles that require M12x1.5 wheel fasteners and a 3/4" (19mm) socket size. Each nut features a closed-end design to keep out dirt and moisture, a 60° tapered seat to match factory wheels, and a durable zinc-plus-black finish applied after cold forging and heat treatment. The single-piece construction reduces the risk of separation under torque and simplifies installation compared with two-piece alternatives.

Which vehicles will these AUTOPTIM lug nuts fit?

They are manufactured to replace common M12x1.5 wheel nuts used on many side-by-sides and ATVs. Confirm thread pitch, seat type, and hex size against your wheel before purchase.

• Compatible models include 2014+ Honda Pioneer 500/700 and several Polaris models such as Ranger XP 900 and General 1000 Base.
• Designed for wheels requiring a 60° tapered (conical) seat.
• Fits bolts with M12x1.5 thread pitch and 35mm nut length.

How do these nuts hold up to corrosion and heavy use?

The nuts use a cold-forged, heat-treated steel core with a zinc base and black surface finish to resist rust and wear in off-road conditions. The closed end helps block contaminants that accelerate corrosion.

• Cold-forged for consistent strength and thread accuracy.
• Heat treatment increases toughness under torque and load.
• Zinc-plus-black coating slows rust and improves appearance.
• Closed-end design helps prevent water and debris intrusion.

What are the key dimensions and hardware details I should check?

Measure your existing wheel studs and wrench size to be sure these nuts match—mismatched hardware can be unsafe. These specifications are provided to make that comparison simple.

• Thread: M12 x 1.5 metric pitch.
• Hex drive: 3/4" (19mm) across flats.
• Overall nut length: 35mm; nut width: 22mm.
• Seat style: 60° tapered (conical) seat for OEM-style wheels.

Are these lug nuts easy to install and maintain?

Installation is straightforward with a 3/4" (19mm) socket and recommended torque wrench. The one-piece design eliminates assembly steps and reduces maintenance compared with multi-piece fasteners.

• Install with standard 3/4" (19mm) socket and torque to vehicle manufacturer specs.
• Closed-end caps reduce cleaning frequency by blocking grit and moisture.
• One-piece construction minimizes cracking or separation under load.
• Regular inspection of torque and finish prolongs service life.

Who is this for: These AUTOPTIM lug nuts suit ATV and UTV owners who need a reliable, OEM-compatible replacement for M12x1.5 wheel fasteners—particularly riders of Honda Pioneer and select Polaris machines. They are best for users who want a corrosion-resistant, one-piece nut with a sealed end and standard 3/4" hex for simple installation and dependable performance on trails, farms, and utility tasks. If you require a different thread pitch, seat angle, or an open-ended style, confirm specifications or choose an alternative product to match your wheels.