93900213
Fifth Wheel Bolt, 0.88 in, 9 x 12, Grade 5
SAF-Holland

The high-strength fastener designed for fifth-wheel couplings delivers essential reliability in the critical interface between the tractor and trailer. This long, steel member features a 0.88 in diameter with a 12.50 in length, enabling secure through-bolt engagement across a common 9 x 12 mounting pattern found in many fifth-wheel assemblies. Grade 5 construction emphasizes strong yield and toughness to resist bending and impact loads during coupling, uncoupling, and highway dynamics. Its VMRS classification places it within the coupling and mainframe subsystem, underscoring its role in maintaining the integrity of the hitch interface under high clamping forces. Practical applications span over-the-road configurations where the fifth-wheel plate is subject to dynamic loading, including startup torque, braking forces, and road irregularities. Regular inspection for wear, straightness, and thread condition is recommended to preserve safe articulation between tractor and trailer components.