Gorilla

Small Diameter Spline Acorn Lug Nuts, Black

$1.50

SKU: 21138BC

In Stock
In Stock
Ships by Jul 31
Free Shipping over $100
30 Days Return

Description

The Gorilla 21138BC small diameter spline acorn lug nuts provide a durable and secure solution for mounting aftermarket wheels. Engineered with a 12mm x 1.50 thread pitch and a 60-degree conical seat, these nuts are heat-treated for enhanced strength and finished in black for a sleek appearance. Their compact 20mm outside diameter and small hex size are specifically designed to fit within tight lug nut pockets on many aftermarket wheels, often requiring a specialized spline key (sold separately or included depending on the specific package) for installation and removal. The overall length measures 1.36 inches, providing sufficient engagement with the wheel stud. It's important to note that these lug nuts are intended for most aftermarket wheels and may not fit original equipment factory wheels. Customers are responsible for confirming fitment with their specific vehicle and wheel combination, as fitment data may not always be readily available for all applications.

Fitment

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Specifications

BrandGorilla
Part Number21138BC
CategoryFasteners

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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