Value Collection 451714BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451714BR is a partially threaded hex head cap screw sized at 1-3/8-12 UNF x 5-1/2 inches under the head, manufactured from Grade 8 steel with a bright uncoated finish. Grade 8 steel provides high tensile strength suited for demanding fastener applications where a standard or lower-grade screw would not hold up. The 1-3/8-12 designation indicates a 1-3/8 inch nominal diameter with 12 threads per inch on a Unified Fine thread form. This screw is manufactured to ASME B18.2.1 dimensional standards, making it a consistent, spec-compliant choice for mechanical assemblies, structural connections, and heavy equipment maintenance.

This cap screw is used in industrial, commercial, and heavy-duty mechanical applications where high-strength fasteners are required. Partially threaded shanks are preferred when a smooth bearing surface under the head is needed to resist shear loads or when clamping two components without thread engagement through the full grip length. Typical installation scenarios include machine frames, structural steel connections, large equipment assemblies, and similar high-load joint applications. The bright uncoated finish is suitable for indoor or protected environments where corrosion exposure is limited.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1-3/8-12 UNF thread form — fine pitch for precise torque control and reduced loosening under vibration
• Partially threaded shank provides a smooth grip section for shear-resistant joints
• Manufactured to ASME B18.2.1 for consistent dimensional conformance
• Bright uncoated finish — no coating buildup to affect thread fit or dimensional tolerance
• 2-1/16 inch hex key size for standard hex drive tooling

Compatibility

Designed for use in inch-series fastener applications requiring a 1-3/8-12 UNF Grade 8 hex head cap screw with a 5-1/2 inch length under head and ASME B18.2.1 compliance.

Installation Notes

Installation is typically performed by millwrights, mechanical contractors, or maintenance technicians using a 2-1/16 inch hex wrench or socket. De-energize, depressurize, or otherwise lock out any equipment before fastener service per applicable OSHA lockout/tagout procedures. Grade 8 fasteners should be torqued to values specified by the equipment manufacturer or applicable engineering standards — do not substitute a lower-grade fastener in a Grade 8-specified joint. Inspect threads for damage before installation; do not install a fastener with crossed or damaged threads.