Value Collection D39188 Hex Cap Screw 3/4-10 X 8 in Grade 8

Product Description

The VALUE COLLECTION D39188 is a Grade 8 steel hex head cap screw with a 3/4-10 UNC thread size and an 8-inch length under head. Partially threaded and finished with a zinc yellow dichromate coating, this fastener is built for high-strength bolted connections in demanding mechanical and structural applications. Grade 8 steel delivers significantly higher tensile strength than standard hardware-grade fasteners, making it a reliable choice where joint integrity is critical. The zinc yellow dichromate finish provides corrosion resistance suitable for both indoor and moderate outdoor environments. This screw meets ASME B18.2.1 and SAE J429 standards.

This fastener is suited for heavy-duty mechanical assemblies, industrial equipment, agricultural machinery, and structural steel connections where Grade 8 strength is specified. The partial thread design allows the unthreaded shank to bear shear loads, a common requirement in bolted joints subject to lateral forces. Maintenance technicians, millwrights, and mechanical contractors working on equipment that calls out UNC 3/4-10 fasteners will find this screw a direct fit for standard inch-system hardware applications.

Key Features

• Grade 8 steel construction for high tensile strength bolted connections
• 3/4-10 UNC thread form per inch-system standard
• 8-inch length under head with partial threading to support shear load bearing at the shank
• Zinc yellow dichromate finish for corrosion resistance
• Meets ASME B18.2.1 and SAE J429 standards for dimensional and mechanical compliance

Compatibility

Designed as a standard inch-system replacement or maintenance fastener for any application requiring a 3/4-10 UNC hex head cap screw at 8 inches in length with Grade 8 mechanical properties.

Installation Notes

Installation should be performed by qualified mechanical or maintenance technicians familiar with high-strength fastener torque requirements for Grade 8 hardware. Consult applicable engineering specifications or torque tables for the correct clamp load based on lubrication condition and joint material. Ensure mating threads are clean and free of debris before assembly. Never reuse fasteners that show signs of thread damage, galling, or deformation.