Value Collection 451042BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451042BR is a fully threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Sized at 1-1/4-12 UNF with a 3-1/2 inch length under head, this fastener is manufactured from Grade 8 steel with a bright, uncoated finish. Grade 8 steel provides high tensile strength suitable for demanding bolted joint applications where lower-grade fasteners would be inadequate. This screw meets ASME B18.2.1 standards, making it a reliable choice for engineers, millwrights, and maintenance professionals working to specification.

This fastener is suited for use in heavy equipment maintenance, machinery assembly, structural bolting, and industrial fabrication. The 1-1/4-12 UNF thread pitch is a fine-thread profile, which provides greater thread engagement and resistance to loosening under vibration compared to coarse-thread equivalents. Full threading along the 3-1/2 inch shank allows maximum engagement flexibility across varying material thicknesses. It is commonly installed by maintenance machinists, millwrights, and industrial mechanics working on presses, conveyors, gearboxes, and similar equipment.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Fully threaded shank allows flexible engagement depth across joint thicknesses
• 1-1/4-12 UNF fine-thread profile for increased resistance to vibration loosening
• Bright, uncoated finish suitable for use with separately applied coatings or in dry interior environments
• Meets ASME B18.2.1 dimensional standards for consistent fit with standard hex nuts and hardened washers
• 1-7/8 inch hex key size for use with standard industrial wrenching tools

Compatibility

Designed for use with standard 1-1/4-12 UNF hex nuts and hardened flat washers conforming to ASME B18.2.2 and ASME F436 specifications, respectively, as applicable to Grade 8 bolted joint assemblies.

Installation Notes

Installation should be performed by qualified mechanics or millwrights familiar with high-strength bolted joint procedures. Always use a calibrated torque wrench and follow the applicable joint design torque specification for Grade 8 fasteners at this diameter and thread pitch. Ensure mating threads and bearing surfaces are clean and free of debris before assembly. When used in critical structural or pressure-bearing applications, consult relevant codes such as AISC or applicable machinery OEM guidelines.