Value Collection 451058BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451058BR is a fully threaded hex head cap screw built to Grade 8 steel specifications for high-strength fastening applications. With a 1-1/2-6 UNC thread size and a 4-inch length under head, this fastener is suited for heavy-duty structural and mechanical assemblies where elevated tensile strength and clamp load are required. Grade 8 classification indicates a minimum proof load and tensile strength consistent with demanding industrial use. The bright, uncoated finish means the fastener ships without any plating or coating treatment. It conforms to ASME B18.2.1, the recognized standard for inch-series hex cap screws, ensuring dimensional consistency.

This cap screw is commonly used in heavy equipment, machinery frames, structural steel connections, and fabrication work where Grade 8 fasteners are specified by design or code. The fully threaded shank provides maximum thread engagement throughout the grip length, making it appropriate for close-tolerance assemblies and applications where thread engagement to the head is required. It is a standard choice for maintenance shops, OEM assembly lines, and field service work across industrial and mechanical trades.

Key Features

• Grade 8 steel construction provides high tensile and proof load strength for demanding applications
• Fully threaded shank maximizes thread engagement along the full 4-inch length under head
• 1-1/2-6 UNC thread form is a standard coarse-thread configuration for broad tool and nut compatibility
• Conforms to ASME B18.2.1 for consistent dimensional tolerances and interchangeability
• Bright, uncoated finish suitable for use as-is or for post-installation coating by the installer
• 2-1/4-inch hex key size compatible with standard heavy-duty wrenching tools

Compatibility

Designed as an OEM-style replacement or direct-use fastener for assemblies requiring a 1-1/2-6 UNC fully threaded hex head cap screw meeting ASME B18.2.1 and Grade 8 material specifications.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using calibrated torque tools appropriate for Grade 8 fasteners at this thread size. Always de-energize and lock out equipment before replacing structural fasteners in machinery. Do not substitute a lower-grade fastener in any application specified for Grade 8. Inspect mating threads for damage or contamination before installation, and use appropriate thread lubricant or anti-seize only if specified by the equipment manufacturer.