Value Collection 451111PS Hex Head Cap Screw 1/2-20 Grade 8

Product Description

The VALUE COLLECTION 451111PS is a 1/2-20 UNF hex head cap screw measuring 6-1/2 inches under the head, manufactured from Grade 8 steel with a bright uncoated finish. Partially threaded along the shank, this fastener meets ASME B18.2.1 dimensional standards. Grade 8 steel delivers high tensile strength suitable for demanding structural and mechanical joint applications. The hex drive requires a 7/16-inch hex key or standard hex socket. Weighing 0.38 pounds, this screw is sized for heavy-duty fastening tasks in industrial, mechanical, and trade assembly work.

This cap screw is suited for high-load bolted connections in mechanical assemblies, equipment frames, structural supports, and general industrial fabrication where UNF thread form and Grade 8 strength are specified. The partial thread design provides a smooth shank section, which is common in applications requiring precise shear load resistance or close-tolerance hole fits. Installers in HVAC equipment assembly, plumbing system supports, and electrical enclosure mounting regularly use fasteners of this type and specification.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/2-20 UNF thread form for fine-thread engagement in steel assemblies
• Partially threaded shank for shear-load and close-tolerance applications
• Bright uncoated finish — suitable for dry or lightly lubricated environments
• Meets ASME B18.2.1 dimensional standards
• 7/16-inch hex drive compatible with standard hex sockets and wrenches

Compatibility

Designed for use in bolted assemblies requiring 1/2-20 UNF Grade 8 hex head cap screws with partial threading per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with proper fastener torque procedures for Grade 8 hardware. De-energize and isolate any equipment before accessing fastened assemblies. Use a calibrated torque wrench and apply the torque value specified by the equipment manufacturer or applicable engineering standard. Do not substitute a lower-grade fastener in applications where Grade 8 is specified by design.