Value Collection 451630BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451630BR is a Grade 8 steel hex head cap screw sized 1-1/4-12 UNF by 14 inches under the head, supplied in a bright uncoated finish with partial threading. Grade 8 steel delivers high tensile strength suited to heavy-duty bolted joints in demanding structural and mechanical assemblies. The screw conforms to ASME B18.2.1 dimensional standards, making it a reliable choice when engineer-specified fastener compliance is required. At 5.3 pounds per unit, this is a substantial fastener intended for large-frame equipment, structural steel, or industrial machinery applications. Machinists, millwrights, ironworkers, and mechanical contractors are the typical installers.

This cap screw is used in applications where a fine-thread UNF engagement is preferred for increased thread-per-inch count and improved torque control in metal-to-metal joints. The 14-inch length under head accommodates thick plate stock, stacked components, or deep through-bolt installations. Partially threaded shanks provide a smooth bearing surface in the bolt shank zone, which helps control shear loading and maintains accurate joint alignment. It is commonly found in heavy equipment frames, press and die assemblies, industrial conveyor structures, and large HVAC or mechanical equipment mounting bases.

Key Features

• Grade 8 steel construction for high tensile strength in demanding bolted assemblies
• 1-1/4-12 UNF thread provides fine-pitch engagement with enhanced torque retention
• 14-inch length under head suits thick-plate and deep through-bolt installations
• Partially threaded shank supports shear load management and joint alignment
• Bright uncoated finish — suitable for use as-is or with field-applied coatings
• Conforms to ASME B18.2.1 dimensional standards for specification-driven work

Compatibility

Designed as a standard inch-series hex head cap screw per ASME B18.2.1, compatible with any 1-1/4-12 UNF tapped hole or standard hex nut of matching thread designation in inch-series fastener applications.

Installation Notes

Installation is performed by machinists, millwrights, or mechanical contractors using a 1-7/8-inch hex wrench or appropriate drive socket. De-energize and lock out all equipment before fastener replacement or assembly work per applicable OSHA lockout/tagout procedures. Verify tapped hole thread condition and thread engagement depth before installation. Do not mix UNF and UNC fasteners in the same joint, and always consult engineer-specified torque requirements for the application.