Value Collection 99251 Hex Head Cap Screw Grade 8 Steel

Product Description

The VALUE COLLECTION 99251 is a heavy-duty hex head cap screw designed for high-strength fastening applications across industrial, mechanical, and structural work. Measuring 1-1/4-7 UNC thread size with a 7-inch length under head, this screw is manufactured from Grade 8 steel in an uncoated finish. It features partial threading, which is standard for longer-body fasteners where full engagement at the clamped joint is required. The ASME B18.2.1 designation confirms dimensional compliance with recognized inch-series fastener standards. Sold in a package of two, this fastener is a practical choice for field repairs, fabrication shops, and maintenance crews working with heavy equipment or structural assemblies.

This cap screw is suited for high-load bolted connections in industrial machinery, structural steel fabrication, heavy equipment maintenance, and mechanical assemblies requiring Grade 8 tensile strength. The 1-1/4-7 UNC thread pattern is a common coarse-thread specification used widely in North American manufacturing and repair environments. The uncoated finish is appropriate for indoor or protected applications or where secondary coating will be applied after installation.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1-1/4-7 UNC coarse thread for broad compatibility with standard nuts and tapped holes
• 7-inch length under head accommodates thick structural or mechanical assemblies
• Partially threaded shank reduces stress concentration in bearing-load zones
• Meets ASME B18.2.1 dimensional standards for inch-series hex head cap screws
• Uncoated finish suitable for dry environments or post-installation treatment

Compatibility

Designed as an OEM-style replacement or standard-supply fastener for any application requiring a 1-1/4-7 UNC Grade 8 hex head cap screw with a 7-inch length under head per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or structural tradesperson familiar with Grade 8 fastener torque requirements for the specific joint application. Always use a properly rated hex socket or open-end wrench matched to the 1-1/4-inch hex head to avoid rounding. Inspect mating threads in the nut or tapped hole for damage or debris before installation. Follow applicable structural or equipment specifications for proper clamp load and fastener preload procedures.