Value Collection 451040BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451040BR is a fully threaded hex head cap screw designed for high-strength bolted connections in industrial and mechanical applications. Manufactured from Grade 8 steel with a bright uncoated finish, this fastener meets ASME B18.2.1 dimensional standards. The 1-1/4-12 UNF thread profile provides fine-thread engagement, which delivers greater tensile strength and improved resistance to loosening under vibration compared to coarse-thread equivalents. At 2-1/2 inches in length under the head and weighing 1.38 pounds per unit, this screw is suited for heavy-duty structural assemblies where precise clamp load is critical. Installation requires a 1-7/8 inch hex key or wrench.

This cap screw is used in heavy equipment, fabrication, maintenance, and repair applications where Grade 8 rated fasteners are specified. It is appropriate for static and dynamic load joints in steel structures, machinery frames, and mechanical assemblies. The fine UNF thread series makes it a common choice when high clamp force is needed in limited engagement depth situations. Machinists, millwrights, ironworkers, and maintenance mechanics typically work with fasteners of this grade and size.

Key Features

• Grade 8 steel construction for high tensile and proof load capacity
• 1-1/4-12 UNF fully threaded profile for maximum thread engagement along the full shaft length
• Bright uncoated finish — suitable for dry or internally lubricated joint conditions
• Meets ASME B18.2.1 dimensional standards for hex head cap screws
• 1-7/8 inch hex drive for use with standard open-end, box-end, or impact tooling

Compatibility

Designed as a standard UNF hex head cap screw compatible with 1-1/4-12 threaded holes and nuts conforming to ASME B18.2.1 specifications.

Installation Notes

Installation should be performed by qualified mechanical trades following applicable industry torque standards for Grade 8 fasteners at this diameter and thread pitch. Always verify hole thread condition and clean threads before installation. Do not mix Grade 8 fasteners with lower-grade nuts or hardware. Apply thread lubricant only when specified, as lubrication significantly affects the torque-to-clamp-load relationship.