Coupler Mounting Kit M12 × 55 (BKC-4-12-55)

Ensure certified, high-strength attachment of commercial overrun brake assemblies to trailer drawbars with the Burquip Coupler Mounting Kit M12 × 55. Engineered specifically for heavy utility trailers, commercial transporters, and caravans fitted with braked couplers rated from 1,300 kg to 3,000 kg, this four-bolt Grade 8.8 high-tensile hardware pack provides the essential clamping force required to handle heavy dynamic towing loads and severe emergency deceleration forces.

Key Features & Benefits:

• Grade 8.8 High-Tensile Steel: Engineered to withstand immense shear forces, severe brake reaction torque, and continuous longitudinal towing stress without stretching, yielding, or shearing.

• Dedicated CBK1300–3000 Compatibility: Specifically calibrated and sized to mount Burquip / KNOTT 1,300 kg up to 3,000 kg braked overrun couplers (CBK1300 through CBK3000 series) directly to trailer mounting flanges.

• Complete Four-Bolt Fastener Pack: Includes four matching high-tensile bolts, heavy-gauge flat washers, and nyloc lock nuts, providing a complete mounting kit straight out of the package.

• Vibration-Resistant Nyloc Retention: Fitted with nylon-insert locking nuts that maintain continuous clamping torque under severe road chatter, rail-crossing shocks, and corrugated gravel vibrations.

• Corrosion-Resistant Electroplated Finish: Coated in a protective zinc electroplate layer to resist road spray, dirt, moisture, and road salt degradation.

• Compact 55 mm Shank Length: Designed specifically for flange-to-flange or standard bracket-to-coupler installations where longer bolts would leave excessive thread protrusion or cause physical interference.

Product Specifications:

• Component: Coupler Mounting Hardware Kit (Pack of 4)

• Brand: Burquip

• Thread Size / Diameter: M12 (12 mm metric coarse pitch)

• Bolt Length: 55 mm

• Steel Grade: Grade 8.8 High Tensile Steel

• Finish: Electroplated / Zinc Plated

• Included Hardware: 4 × M12 × 55 mm High-Tensile Bolts, 4 × Nyloc Locking Nuts, Flat Washers

• Primary Compatibility: Burquip / KNOTT CBK1300 – CBK3000 (1,300 kg to 3,000 kg Braked Overrun Couplers)

• Category: Coupling Device Accessories / Fastener Kits

• Application / Fitment: Commercial Braked Trailers, Heavy Caravans, Car Transporters, Plant & Machinery Trailers