Project Kics WCB381R 12x1.50 38mm Compression Bolt Set Red 20-Piece

The Project Kics WCB381R Compression Bolt Set is an innovative wheel accessory designed to enhance the locking performance and appearance of your open-ended racing lug nuts. This 20-piece set features a unique internal design that prevents lug nut loosening while creating a custom extended hub bolt appearance.

Key Features:

• M12x1.50 thread pitch with 38mm overall length
• Premium red anodized aluminum construction
• Built-in steel ball and spring mechanism for enhanced locking effect
• Designed exclusively for use with through-style open-ended lug nuts
• Complete 20-piece set for full vehicle coverage
• Includes 6mm hex L-wrench for installation
• Manufactured in Japan to strict quality standards

How It Works:

Each compression bolt features an internal steel ball and spring mechanism housed within an aluminum body. When installed onto the exposed threaded portion of your open-ended lug nuts, the spring tension creates additional compression force that improves the loosening prevention effect of the attached nut. This innovative design also creates the appearance of extended hub bolts for a distinctive racing-inspired look.

Installation Notes:

These compression bolts are designed for retrofitting onto lug nuts already installed on the vehicle. Maximum tightening torque is 4 N·m (0.4 kgf·m). Check total nut length and thread allowance before installation to ensure proper fitment. Compatible with Project Kics R40 and other open-ended through-style racing lug nuts.

Project Kics is a division of KYO-EI Corporation, a trusted Japanese manufacturer with over 50 years of experience producing premium wheel accessories for street and racing applications.