Secure and streamline your trailer coupler installation with the 0.63 Bolt Kit 5—a 5/8″ Grade 8 bolt kit engineered for adjustable channel or coupler mounts. Ideal for OEM-style assembly, aftermarket upgrades, and on-the-road repairs requiring trusted, heavy-duty fasteners.

Kit Includes

• 4 - 1A10028 Bolts (0.63", Grade 5, 150 lb-ft torque)
• 4 - 6F10 Nuts

Features

• Complete Grade 8 Hardware: Each kit includes 5 bolts, nuts, and washers—ready for immediate installation

• Heavy-Duty 5/8″ Bolts: Grade 8, fine-thread bolts resist loosening and shear failure under load

• Locking Nuts Included: Nylon-insert lock nuts prevent strip and seal in high-vibration environments

• Ideal for Adjustable Channels: Designed to fit standard 5/8″ coupler and tow-ring mounting holes

• Corrosion-Resistant Finish: Zinc or electro-galvanized coating protects against rust

Specifications

Why Choose This Kit

• OEM-Quality Safety: Grade 8 hardware meets or exceeds manufacturer specs—engineered to maintain tight torque even under vibration

• One-and-Done Convenience: Includes everything needed for installation—eliminates downtime searching for parts

• Built for Rough Conditions: Zinc coatings and hardened steel prevent corrosion and provide long-term reliability

Compatible With

• • Adjustable channel couplers from Dexter, Demco, Buyers, Curt, et al.

  • 5/8″ mounting hole trailer couplers, lunette rings, and tow-ring plates

This kit fits on coupler part numbers 2003737