Value Collection 451164BR Hex Cap Screw 7/8-9 X 8.5 in Grade 8

Product Description

The VALUE COLLECTION 451164BR is a Grade 8 steel hex head cap screw sized 7/8-9 x 8-1/2 inches, designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. The partially threaded shank provides a bearing surface for load-bearing joints while the unified coarse (UNC) thread form ensures reliable engagement in standard tapped holes. Manufactured to ASME B18.2.1 dimensional standards, this screw ships in a bright, uncoated finish. It is installed by millwrights, maintenance mechanics, and industrial technicians wherever a heavy-duty inch-series fastener is required.

This cap screw is suited for heavy equipment assembly, structural steel connections, machinery frames, and other industrial applications that demand a high-tensile fastener. The 7/8-9 UNC thread size and 8-1/2 inch length under the head make it appropriate for bolting through thick steel plates, flanges, or stacked components. The bright finish is acceptable in dry or controlled environments where corrosion resistance is not a primary requirement.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• Partially threaded shank provides a grip length for shear-loaded joints
• 7/8-9 UNC thread form for compatibility with standard inch-series tapped holes and nuts
• Meets ASME B18.2.1 dimensional standards for hex head cap screws
• Bright/uncoated finish — no added plating thickness to affect thread fit
• 1-5/16 inch hex key size for use with standard open-end, box, or impact wrenches

Compatibility

Designed for use with standard 7/8-9 UNC hex nuts, flat washers, and lock washers conforming to inch-series fastener standards. Fits any application requiring an ASME B18.2.1 hex head cap screw in the 7/8-9 thread size.

Installation Notes

Installation is performed with a 1-5/16 inch open-end, box-end, or impact wrench. Degrease mating surfaces and verify thread condition in the tapped hole or nut before assembly. Follow applicable torque specifications from your engineering drawings or fastener standards reference — do not estimate torque on Grade 8 hardware. Confirm the joint design accounts for the partially threaded shank length when calculating grip and thread engagement.