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Carbonado C-Block 1/2-20 UNF Conical Seat Locking Wheel Nuts – Black
Protection against wheel theft
Carbonado C-Block locking wheel nuts provide a simple and effective way to protect wheels against unauthorized removal. Each nut features a specially shaped security profile matched to the dedicated key included in the set.
The locking nuts are made of a high-quality steel alloy with the dimensional precision required for correct wheel mounting.
Wide range of applications
This version features an 1/2-20 UNF thread and a conical seating surface, making it suitable for many vehicle and wheel models that use this type of fastening.
Compatibility depends on the technical specifications of the particular vehicle and wheel. Before purchase, check in particular:
- thread diameter and pitch,
- wheel seat type,
- required seating surface shape,
- nut dimensions and the way it fits into the wheel.
Rotating security sleeve
A movable, freely rotating sleeve surrounds the profiled security element. It makes it more difficult to grip the nut from the outside or use an unsuitable tool to remove it.
The combination of an individual security profile and rotating sleeve increases protection against attempts to remove the wheel without the correct key.
Two keys included
The Carbonado C-Block set includes 2 keys (adapters) matched to the security profile of the nuts. The second key provides a practical backup in case one is lost and can be stored separately.
Black electrophoretic coating
The nuts are coated with black paint applied using an electrophoretic coating process (cataphoresis / e-coating). This technology provides an even coating across the entire surface, including recesses and hard-to-reach areas, creating a uniform protective layer.
The coating increases resistance to corrosion, moisture and weather conditions, while also providing a durable black finish that complements dark-colored wheels. The coating is also designed to withstand repeated wheel installation and removal.
Key benefits
- 1/2-20 UNF thread,
- conical seating surface,
- wide range of applications depending on vehicle and wheel specifications,
- special security profile protecting against unauthorized removal,
- rotating sleeve making the nut more difficult to grip with a standard tool,
- 2 security keys included,
- steel construction,
- black electrophoretic coating,
- increased resistance to corrosion and weather conditions.















