Value Collection 451030BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451030BR is a hex head cap screw designed for heavy-duty fastening applications requiring high tensile strength and dimensional precision. Manufactured from Grade 8 steel with a bright uncoated finish, this fastener measures 1-1/4-7 thread size with a 4-inch length under head and carries partial threading along the shank. It conforms to ASME B18.2.1 standards and features a UNC thread form. The 451030BR is suited for structural assemblies, equipment mounting, and mechanical connections where Grade 8 load ratings are required. Licensed tradespeople and maintenance mechanics working with heavy machinery, fabricated steel structures, or industrial equipment installations commonly specify this fastener.

This cap screw fits applications across general industrial, construction, and mechanical maintenance environments. Partial threading on the shank provides shear strength in bolted joint applications where the fastener passes through clearance holes before engaging a tapped hole or nut. The 1-1/4-7 UNC thread pitch is standard for large-diameter fastener work in both OEM assembly and field repair contexts. Installers working in HVAC equipment bases, structural steel framing, pump mounting, and heavy equipment chassis will encounter this size regularly.

Key Features

• Grade 8 steel construction provides high tensile and proof load ratings for demanding structural applications
• Partially threaded shank maintains shear strength through clearance sections of bolted joints
• UNC thread form per ASME B18.2.1 ensures dimensional interchangeability with standard fastener hardware
• Bright uncoated finish suits dry indoor environments and assemblies where coating thickness tolerance is critical
• 1-11/16 inch hex key size accommodates standard industrial wrenches and impact sockets
• Single-piece packaging supports maintenance and repair quantities without minimum bulk commitment

Compatibility

Designed as a standard-dimension replacement or service fastener for any application requiring a 1-1/4-7 UNC hex head cap screw with Grade 8 strength rating and ASME B18.2.1 compliance.

Installation Notes

Installation of Grade 8 hex head cap screws should be performed by a qualified mechanic or tradesperson familiar with proper fastener torque procedures and joint design requirements. Always confirm thread engagement depth and hole alignment before driving. Use the correct 1-11/16 inch hex wrench or impact socket rated for Grade 8 fastener torque loads. Do not substitute a lower-grade fastener in any application specified for Grade 8.