Value Collection D39200 Hex Head Cap Screw 7/8-9 Grade 8

Product Description

The VALUE COLLECTION D39200 is a partially threaded hex head cap screw designed for high-strength fastening applications in mechanical, industrial, and construction assemblies. Manufactured from Grade 8 steel with a zinc yellow dichromate finish, this fastener delivers superior tensile strength and corrosion resistance compared to lower-grade alternatives. The 7/8-9 UNC thread size and 3-1/2 inch length under head make it well suited for heavy-duty bolted connections where reliable clamping force is required. It conforms to ASME B18.2.1 and SAE J429 standards, ensuring dimensional accuracy and material performance meet recognized industry specifications.

This cap screw is used across a wide range of industrial and trade applications including equipment mounting, structural steel connections, HVAC equipment bases, pump and motor mounting, and general mechanical assemblies. The partial threading allows for a smooth shank section that resists shear loads, making it appropriate for joints that experience lateral stress. It is sold individually but requires a minimum order quantity of 10 units.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Zinc yellow dichromate finish provides corrosion resistance in moderate environments
• Partially threaded shank handles shear loads in addition to clamping loads
• 7/8-9 UNC thread form ensures broad nut and tapped-hole compatibility
• Meets ASME B18.2.1 and SAE J429 dimensional and material standards

Compatibility

Designed as a standard inch-series hex head cap screw compatible with any 7/8-9 UNC tapped hole, nut, or threaded insert conforming to ASME B18.2.1 dimensional requirements.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using an appropriate hex socket or open-end wrench sized for the 7/8-9 fastener. Always confirm the mating thread standard and grade rating of the nut or tapped hole before assembly. Follow applicable torque specifications from the equipment manufacturer or relevant fastener standards for Grade 8 hardware. De-energize and lock out equipment before replacing or tightening fasteners on powered machinery.