Value Collection 451017BR Hex Cap Screw 1-1/8-12 X 4 in Grade 8

Product Description

The VALUE COLLECTION 451017BR is a Grade 8 steel hex head cap screw with a 1-1/8-12 UNF thread and a 4-inch length under the head. It is partially threaded and left bright with no finish coating. Grade 8 steel provides high tensile strength for heavy-duty fastening in structural, mechanical, and industrial assemblies. This fastener conforms to ASME B18.2.1 dimensional standards. It is driven with a 1-11/16-inch hex key and is sold individually. Machinists, millwrights, maintenance technicians, and construction tradespeople install this type of fastener in high-load bolted joint applications.

This cap screw is suited for heavy equipment, structural steel connections, industrial machinery, and other applications requiring a high-strength inch-series UNF fastener. The partial threading allows the unthreaded shank to bear shear loads in close-tolerance bolt holes, making it appropriate for precision assemblies and rigid connections where full-thread fasteners are not specified. Its bright uncoated finish is typical for dry or interior service environments.

Key Features

• Grade 8 steel for high tensile and proof load capacity in demanding applications
• 1-1/8-12 UNF thread provides fine-pitch engagement for precise clamping force control
• Partially threaded shank handles shear loads in close-tolerance holes
• Conforms to ASME B18.2.1 dimensional standards for consistent fitment
• Bright uncoated finish — no coating to account for in torque calculations
• 1-11/16-inch hex key drive size for standard industrial tooling

Compatibility

Designed as a standard inch-series UNF hex head cap screw for use in any application specifying a 1-1/8-12 x 4-inch Grade 8 fastener per ASME B18.2.1.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 1-11/16-inch hex wrench or socket. Follow the torque specifications called out in the applicable engineering drawing or equipment service manual — no generic torque value applies to all Grade 8 joints. Inspect mating threads for cleanliness and damage before assembly. Reuse of high-strength fasteners in critical structural joints should follow the original equipment manufacturer guidance or applicable structural codes.