Value Collection 39250 Hex Head Cap Screw 1-1/4-7 X 8 in Grade 8

Product Description

The VALUE COLLECTION 39250 is a partially threaded hex head cap screw designed for high-strength bolted connections in heavy-duty mechanical and structural applications. Manufactured from Grade 8 steel with a Unified National Coarse (UNC) thread form at 1-1/4-7, it delivers the tensile strength required for demanding fastener applications. The 8-inch length under head and zinc yellow dichromate finish provide corrosion resistance suitable for industrial environments. This fastener meets ASME B18.2.1 dimensional standards and is installed by millwrights, maintenance mechanics, and industrial tradespeople working on equipment assemblies, flanged connections, and structural steel work.

This cap screw is suited for industrial, commercial, and heavy equipment applications where Grade 8 fastener specifications are required. The partial threading allows for a smooth shank section through clearance holes, providing better shear resistance in bolted joints. It is commonly used in machinery mounting, structural steel assemblies, and equipment frames where high-clamp-load fastening is specified. The zinc yellow dichromate finish offers added protection against corrosion in moderately demanding environments.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Partially threaded shank improves shear load performance in bolted joints
• 1-1/4-7 UNC thread form for compatibility with standard inch-series nuts and tapped holes
• Zinc yellow dichromate finish provides corrosion resistance in industrial settings
• Meets ASME B18.2.1 dimensional standards for hex head cap screws
• 8-inch length under head suits deep-reach and thick-material fastening applications

Compatibility

Designed for use with standard 1-1/4-7 UNC inch-series hex nuts, flat washers, and lock washers in bolted assemblies conforming to ASME B18.2.1 specifications.

Installation Notes

Installation should be performed by qualified millwrights or maintenance mechanics using appropriate calibrated torque tooling sized for a 1-1/4-inch hex fastener. Consult applicable structural or equipment specifications for required torque values before installation. Ensure mating tapped holes or nuts are clean, undamaged, and match the 1-1/4-7 UNC thread form before driving the fastener. Never impact-drive Grade 8 cap screws without verifying that installation method is approved for the application.