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Fasteners› Wheel and Tire Fastener Kits

Gorilla

Small Diameter Spline Acorn Lug Nuts M12-1.25 Black

$63.79 $38.99 Save $24.80

SKU: K5CS12125BGR

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Overview

The Gorilla Automotive K5CS12125BGR is a set of 20 small diameter spline acorn lug nuts designed for aftermarket wheels. These lug nuts feature a closed-end design, conical seat type, and a black finish. They are constructed from heat-treated alloy steel for improved durability.

The kit includes a special 1921SD-KEY for use with the spline drive style. The lug nuts have a M12-1.25 thread pitch and utilize a dual hex size of 3/4" (19mm) and 13/16" (21mm).
Show original supplier description
The Gorilla Automotive K5CS12125BGR is a set of 20 small diameter spline acorn lug nuts, meticulously designed to enhance the security and aesthetics of your vehicle's wheels. Crafted from heat-treated alloy steel, these lug nuts offer superior strength and durability, ensuring a reliable fit for your aftermarket wheels. This kit is engineered with a spline drive style and a closed-end design, featuring a conical seat type for optimal contact. The lug nuts have a M12-1.25 thread pitch and come with a dual hex size, accommodating both 3/4" (19mm) and 13/16" (21mm) sockets for versatile application. The package includes 20 lug nuts and one specialized 1921SD-KEY, essential for the unique spline drive system. Gorilla Automotive lug nuts are known for setting industry standards in quality and durability, with the company being a leader in innovation and customer service since 1976. The heat-treated construction further improves their finish and longevity. Customers are advised to confirm fitment for their specific vehicle and wheel combination, as the store cannot guarantee compatibility without vehicle selection.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGorilla
Part NumberK5CS12125BGR
CategoryFasteners
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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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