Product Description
Gorilla 1378SPK-KEY 6-Spline Spike Lug Nut Replacement Key
Replace a lost key or keep a spare with the Gorilla Automotive 1378SPK-KEY. This 6-spline spike lug nut key is designed for compatible Gorilla small-diameter spline spike lug nuts that specify this replacement key.
The 13/16-inch and 7/8-inch dual hex drive provides wrench engagement for servicing compatible lug nuts. Keep the correct key with your vehicle's tire-changing tools so it is available when you need wheel or tire service.
Product Specifications
- Brand: Gorilla Automotive
- Manufacturer part number: 1378SPK-KEY
- Product type: Replacement spline spike lug nut key
- Spline count: 6
- External hex sizes: 13/16 inch and 7/8 inch, commonly listed as 21mm and 22mm
- Application: Compatible Gorilla spike lug nuts requiring key 1378SPK-KEY
- Package contents: One replacement key; lug nuts sold separately
Check Lug Nut Compatibility Before Ordering
This key is not universal for all 6-spline lug nuts. Spline diameter, profile and clearance must match your lug nuts. Select the replacement by the key part number specified for your Gorilla lug nut set.
Vehicle year, make, model, wheel brand and lug nut thread pitch alone do not identify the correct spline key. A truck or tuner vehicle can use different aftermarket lug nuts, each requiring its matching tool.
- Confirm your lug nut set specifies 1378SPK-KEY.
- Compare the spline opening and tool dimensions with your original key when available.
- Do not assume compatibility with other brands or other Gorilla spline-drive designs.
- The 13/16-inch and 7/8-inch measurements describe the external wrench hex sizes, not the internal spline opening.
A Replacement or Spare for Your Spike Lug Nuts
A missing spline key can delay wheel removal and tire service. The Gorilla 1378SPK-KEY provides the matching tool when your compatible Gorilla spike lug nuts require this part number. Keep a spare accessible and let your tire installer know where it is stored.
Frequently Asked Questions
Will this fit every 6-spline lug nut?
No. Six splines alone do not establish compatibility. Your lug nuts must match the key's spline profile, diameter and clearance requirements.
Is this the correct key for my truck?
Fitment depends on the lug nuts installed on your truck. Check the lug nut set's required replacement key number rather than choosing by vehicle make and model.
What wrench sizes does this key use?
The key has 13/16-inch and 7/8-inch external hex sizes, commonly listed as 21mm and 22mm.
Are lug nuts included?
No. This listing is for one Gorilla 1378SPK-KEY replacement key. Lug nuts are sold separately.
Can I use this instead of a coded wheel lock key?
Do not assume it will replace a coded wheel lock key. This tool is intended for compatible spline spike lug nuts requiring part number 1378SPK-KEY.
Need help choosing a replacement? Call or text A2i Wheel & Tire at 616-330-6600 with your lug nut part number and clear photos of the lug nuts and original key, if available.
Shop replacement spline lug nut keys or browse lug nuts and wheel hardware.
