The 0.63 Bolt Kit 4 delivers everything you need to securely mount a trailer coupler or tow ring to an adjustable channel. Featuring heavy-duty Grade 8 bolts and hardware, this kit is ideal for OEM builds, service shops, or do-it-yourself maintenance where reliability counts.

Kit Includes

• 4 - 1A10028 Bolts (0.63", Grade 5, 150 lb-ft torque)
• 4 - 1S10 Nuts
• 4 - 4B10 Washers

Features

• Complete Hardware Set: Comes with 4 Grade 8 bolts, lock nuts, and lock washers—no need to source separate fasteners

• Heavy-Duty Strength: 5/8″–11 x 2½″ Grade 8 hex bolts designed to withstand high clamping force and resist loosening under load

• Corrosion-Resistant Finish: Zinc or chromate plating helps protect fasteners from rust and wear

• Vehicle-Grade Security: Lock washers and lock nuts ensure components stay tight even during heavy-duty towing

Specifications

Why Choose This Kit

• Built to Last: Grade 8 bolts offer exceptional shear strength and clamp force, maintaining integrity in heavy-duty applications

• Secure Fit: Lock washers and nuts minimize the risk of hardware loosening due to vibration

• Time-Saving Convenience: A ready-to-use kit ensures compatibility and consistency with OEM specifications

• Quality-Driven: Meets high manufacturing standards for trailer coupling installations

Ideal For

• Manufacturers performing OEM coupler or tow ring installs

• Fleet- or shop-level maintenance teams replacing worn hardware

• DIY users seeking reliable, industry-grade parts

This kit fits on coupler part numbers 2003728, 2004642, & 2011811