Project Kics WCB383A 38mm Compression Bolt Set M12x1.25 Gold 20 Pieces

The Project Kics WCB383A is a premium 38mm compression bolt set designed exclusively for use with Project Kics open-ended through-style lug nuts. Manufactured in Japan by KYO-EI, these innovative wheel accessories combine functionality with style to enhance both the security and appearance of your wheel setup.

Key Features:

• M12x1.25 thread pitch for precise fitment compatibility
• 38mm length creates an extended stud appearance when installed
• Built-in steel ball and spring mechanism for enhanced lug nut security
• Aluminum construction with attractive gold anodized finish
• Includes 6mm hex L-type wrench for installation

Each compression bolt features an integrated steel ball and spring inside the aluminum body. When threaded into the open end of compatible Project Kics lug nuts, the spring compresses against your vehicle's stud, creating additional tension that improves loosening prevention and enhances wheel security under all driving conditions. The 38mm length protrudes from the lug nut, creating a unique aesthetic that resembles extended hub studs.

Compression bolts must be installed after lug nuts are already torqued to the vehicle. Maximum tightening torque for compression bolts is 4 N·m (0.4 kgf·m). Exceeding this torque specification may damage the bolt tip or reduce spring elasticity. Requires minimum 8mm of exposed thread beyond the lug nut for proper installation.

Designed specifically for Project Kics R40 and other open-ended through-type lug nuts with M12x1.25 thread pitch. Not compatible with closed-end lug nuts or standard lug nut designs.