Value Collection 451794BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451794BR is a heavy-duty hex head cap screw designed for high-strength bolted assemblies in industrial and mechanical applications. Manufactured from Grade 8 steel with a bright uncoated finish, this fastener delivers the elevated tensile and proof load ratings required for demanding structural and equipment-mounting work. The 1-1/2-12 thread is a UNF (Unified National Fine) configuration, providing finer thread engagement and greater resistance to loosening under vibration. At 12 inches under the head with partial threading, it is suited for through-bolting thick flanges, machinery bases, and heavy fabrications. Installed by millwrights, maintenance mechanics, and field technicians, this screw meets ASME B18.2.1 dimensional standards.

This cap screw is commonly used in industrial maintenance, heavy equipment assembly, and structural fabrication where Grade 8 strength is specified. The partial-thread configuration is standard for longer fasteners, ensuring the unthreaded shank spans the grip length while threads engage only the nut or tapped hole. It is appropriate for both shop fabrication and field installation in applications governed by engineering specifications requiring high-strength inch-series fasteners.

Key Features

• Grade 8 steel construction for high tensile strength in demanding load-bearing applications
• UNF 1-1/2-12 thread series for fine-pitch engagement and vibration resistance
• 12-inch length under head with partial threading for proper grip in thick-stock assemblies
• Bright uncoated finish — no coating variation to account for in torque calculations
• Meets ASME B18.2.1 dimensional standards for hex head cap screws
• 2-1/4-inch hex key size for use with standard heavy-duty wrenching tools

Compatibility

Designed as an inch-series UNF hex head cap screw for use in any assembly specifying a 1-1/2-12 Grade 8 fastener per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or millwright following applicable engineering torque specifications for Grade 8 fasteners at this diameter. Always verify that the mating nut or tapped hole is rated for Grade 8 load before final assembly. Use a calibrated torque wrench and apply fastener lubricant or thread compound only if specified by the joint design, as dry and lubricated torque values differ significantly. Inspect threads for damage before installation and do not use this fastener as a direct replacement for a different grade without engineering review.