ARK Coupling Fixing Bolts 100mm x 12mm Zinc with 37mm Thread & Nyloc Nuts (SKU: CMB141)

ARK Coupling Fixing Bolts (CMB141) provide a secure, high-strength solution for mounting trailer couplings to drawbars. Each bolt measures 100mm long with a 12mm diameter (approx. 1/2″) and features a 37mm thread length, making it suitable for most standard coupling installations.

Key Features:

• Bolt Size: 100mm (4″) Length x 12mm Diameter
• Thread Length: 37mm – ideal for consistent fastening strength
• Material: Zinc-plated for corrosion resistance and outdoor durability
• Includes: Nyloc nuts – resist vibration and prevent loosening during transit
• High Tensile Strength: Designed for secure coupling attachment on trailers and caravans

Applications:

Perfect for fixing standard trailer couplings onto:

• Box trailers
• Caravans
• Boat trailers
• Utility trailers and RVs

Installation Tips:

• Ensure bolts are tightened evenly to prevent stress on the coupling body
• Use washers where needed to avoid damage to mounting surfaces
• Nyloc nuts do not require threadlocker, but should be fully torqued

Whether you’re fitting a new coupling or replacing old hardware, the ARK CMB141 bolt set offers reliable performance and lasting durability under real towing conditions.