XB-403
Spring
SAF-Holland

Elastic energy-management component integrated into compression coupler assemblies to absorb shocks and control motion between coupling halves. It functions to minimize backlash, dampen transient loads, and preserve alignment during dynamic operation of towed vehicles. VMRS code 053-007-028 situates this item within the fastener and accessory subset that supports coupler systems, while category 42579 designates it for use in compression coupling hardware. Practical applications include maintaining consistent contact force across the joint, reducing wear on mating surfaces, and improving handling stability during deceleration and rough-road conditions. Install with correct orientation and secure seating to achieve the intended preload and torque characteristics. Since the family emphasizes durability in outdoor service, expect corrosion-resistant finishes and robust material selection. Regular maintenance involves checking for wear, discoloration, or deformation that could indicate reduced stiffness or misalignment, and replacing before joint slack increases or the risk of uncoupling during operation.