Value Collection 451140PR Hex Head Cap Screw 1/2-20 X 13 in Grade 8

Product Description

The VALUE COLLECTION 451140PR is a Grade 8 steel hex head cap screw in a 1/2-20 UNF thread size with a 13-inch length under head. Partially threaded, it is designed for high-strength fastening applications where a smooth shank section is required to carry shear loads or allow for proper joint clamping. The bright uncoated finish suits dry or indoor installations or applications where a plated finish is not specified. This fastener meets ASME B18.2.1 dimensional standards and is installed by mechanical contractors, millwrights, HVAC technicians, and general maintenance professionals working with inch-series hardware.

This cap screw is suited for industrial, commercial, and mechanical assembly applications requiring a high-strength inch-series fastener. The 1/2-20 fine thread provides greater tensile strength and finer adjustment compared to coarse-thread equivalents, making it a common choice in precision assemblies, equipment mounting, and structural connections. A 3/4-inch hex key size allows use with standard open-end, box-end, or socket wrenches. It is appropriate for use in machinery, HVAC equipment mounting, structural steel connections, and similar trade applications.

Key Features

• Grade 8 steel construction provides high tensile and yield strength for demanding fastening applications
• 1/2-20 UNF fine thread offers tighter thread engagement and greater resistance to loosening under vibration
• Partially threaded shank allows for shear load transfer and proper joint clamping in bolted connections
• Bright uncoated finish — no added coating thickness to affect thread fit
• Meets ASME B18.2.1 dimensional standards for consistent fit and interchangeability
• 3/4-inch hex size compatible with standard wrenches and sockets

Compatibility

Designed as an OEM-style and general-use replacement or new-installation fastener for applications requiring a 1/2-20 UNF, Grade 8, partially threaded hex head cap screw per ASME B18.2.1.

Installation Notes

Installation is performed by qualified mechanical, HVAC, or maintenance personnel using a 3/4-inch open-end, box-end, or socket wrench. De-energize and lock out all equipment before working in any fastener access area per applicable OSHA lockout/tagout procedures. Apply thread lubricant or anti-seize only if specified by the equipment manufacturer, as Grade 8 fasteners have specific torque-tension relationships that can be affected by lubrication. Inspect threads for damage before installation and discard any fastener showing deformation or corrosion.