Value Collection D39203 Hex Head Cap Screw 7/8-9 X 5 in Grade 8

Product Description

The VALUE COLLECTION D39203 is a Grade 8 steel hex head cap screw with a 7/8-9 UNC thread and a 5-inch length under head. It is partially threaded and finished with a zinc yellow dichromate coating for corrosion resistance. This fastener meets ASME B18.2.1 and SAE J429 standards, making it a reliable choice for high-strength bolting applications. It is commonly installed by mechanical contractors, millwrights, and maintenance technicians working on structural assemblies, machinery, and heavy equipment where a high-tensile hex cap screw is required.

This screw is suited for industrial, commercial, and maintenance applications that demand Grade 8 tensile strength. The 7/8-9 UNC thread pattern and 5-inch shank length make it appropriate for thick stock assemblies and through-bolt configurations. The zinc yellow dichromate finish provides a baseline level of corrosion protection for indoor and light-duty outdoor environments. Mechanical and structural tradespeople will find this fastener appropriate wherever a partially threaded, inch-series cap screw is called for in high-load applications.

Key Features

• Grade 8 steel construction for high-tensile-strength bolting applications
• 7/8-9 UNC thread with 5-inch length under head, partially threaded
• Zinc yellow dichromate finish provides corrosion resistance
• Meets ASME B18.2.1 and SAE J429 standards for dimensional and mechanical compliance
• Hex head drive for standard socket or wrench installation

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 7/8-9 UNC thread pattern with a 5-inch length under head and Grade 8 tensile strength.

Installation Notes

Installation should be performed by a qualified tradesperson using appropriate torque equipment sized for 7/8-inch hex fasteners. Always de-energize and lock out any machinery before replacing structural or mechanical fasteners. Use of hardened flat washers under the head is common practice with Grade 8 cap screws to distribute load and protect the mating surface. Follow applicable ASME or equipment manufacturer torque specifications for the joint being assembled.