Designed for demanding trailer axle and suspension assemblies, this hex-head fastener provides reliable, high-clamp strength in critical mounting points such as brackets, yokes, and support plates. The 1.13 inch diameter signals substantial shear and tensile capacity, enabling secure attachment under dynamic road conditions, heavy loads, and side-to-side movementOften encountered in highway service for freight carriers. Its hex head geometry allows easy, repeatable torque application with standard tools, which translates to faster maintenance, fewer stripped fasteners, and consistent preload across fastener clusters. This component adheres to industry-standard engineering practices for axle and suspension hardware, as reflected by the VMRS code 053-007-005, which identifies fasteners used within the suspension and axle subsystems. Cross-references SGO 932 01 051 and TDA R304361 aid technicians and parts managers in locating compatible alternatives or replacements within established catalogs. Category context provided by the identifier 42590 places this item squarely in trailer axle and suspension hardware, where reliable clamping, corrosion resistance considerations, and compatibility with common mounting geometries are essential. In practical terms, it contributes to fleet reliability by maintaining proper alignment, reducing gear wear, and supporting consistent load distribution across the axle assembly, even under rough roads and varying payloads.