Value Collection 451114PS Hex Head Cap Screw 1/2-20 X 8 in Grade 8

Product Description

The VALUE COLLECTION 451114PS is a Grade 8 steel hex head cap screw in a 1/2-20 UNF thread size with an 8-inch length under head. It features partial threading and a bright, uncoated finish, making it suitable for high-strength fastening applications where a bare steel surface is acceptable. Manufactured to ASME B18.2.1 standards, this fastener is driven with a 7/16-inch hex key and is appropriate for mechanical assemblies, structural connections, and equipment installations in trade and industrial settings.

This cap screw is commonly used in mechanical and structural applications across HVAC equipment mounting, plumbing equipment supports, electrical enclosure assemblies, and general industrial fabrication. The 1/2-20 UNF thread pitch is a fine-thread specification, offering increased tensile strength and resistance to loosening under vibration compared to coarse-thread equivalents. The 8-inch length under head accommodates thick material stacks or applications requiring extended fastener reach. Tradespeople and maintenance technicians working on equipment frames, skid assemblies, or structural supports will find this fastener appropriate for demanding installations.

Key Features

• Grade 8 steel construction for high tensile and yield strength requirements
• 1/2-20 UNF fine-thread specification for improved vibration resistance
• 8-inch length under head suits thick material stacks and extended-reach applications
• Partially threaded shank provides a smooth bearing surface in the grip area
• Bright, uncoated finish meets ASME B18.2.1 dimensional standards
• Driven with a 7/16-inch hex key for standard wrench compatibility

Compatibility

Designed as an OEM-style replacement or standard fastener for any application requiring a 1/2-20 UNF Grade 8 hex head cap screw with an 8-inch length under head per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with high-strength fastener procedures. Always verify that the mating threads and tapped hole or nut meet the Grade 8 load requirements before installation. Use a calibrated torque wrench and apply the appropriate torque value as specified by the equipment manufacturer or applicable structural standard. Inspect threads for damage before installation and do not use this fastener in applications requiring a coated or corrosion-resistant finish without engineering review.