Value Collection D39501 Hex Head Cap Screw 7/8-14 X 4 in

Product Description

The VALUE COLLECTION D39501 is a Grade 8 steel hex head cap screw in a 7/8-14 UNF thread size with a 4-inch length under head. It features a zinc yellow dichromate finish that provides corrosion resistance in demanding service environments. The screw is partially threaded, conforming to ASME B18.2.1 and SAE J429 standards, making it suited for high-strength fastening applications. Licensed tradespeople and maintenance technicians working on mechanical assemblies, equipment mounts, and structural connections rely on Grade 8 fasteners where tensile strength and dimensional consistency are critical.

This fastener is used across a wide range of commercial and industrial applications including HVAC equipment mounting, mechanical room installations, pump and compressor assemblies, and general trade service work. The 7/8-14 UNF thread profile is a fine-thread designation commonly specified in OEM equipment and structural assemblies requiring precise torque control and vibration resistance. Minimum order quantity is 10 units.

Key Features

• Grade 8 steel construction for high-strength fastening requirements
• 7/8-14 UNF fine-thread profile for precise fit and vibration resistance
• 4-inch length under head with partial threading per ASME B18.2.1 and SAE J429
• Zinc yellow dichromate finish provides corrosion protection in service environments
• Hex head drive compatible with standard socket and wrench tooling

Compatibility

Designed as a high-strength replacement or service fastener for mechanical assemblies specifying a 7/8-14 UNF Grade 8 hex head cap screw with a 4-inch length under head and partial threading.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with high-strength fastener torque specifications for the equipment being serviced. Always consult the equipment manufacturer's torque table for Grade 8 fasteners at this thread size before final tightening. Inspect mating threads for damage or contamination before installation. Do not mix Grade 8 fasteners with lower-grade nuts or threaded inserts not rated for the same load class.