Value Collection D39503 Hex Cap Screw 7/8-14 X 5 in Grade 8

Product Description

The VALUE COLLECTION D39503 is a Grade 8 steel hex head cap screw with a 7/8-14 UNF thread and a 5-inch length under head. It features a zinc yellow dichromate finish that provides corrosion resistance in demanding service environments. The partial threading design is suited for applications where the unthreaded shank must bear shear loads or align mating components. This fastener meets ASME B18.2.1 and SAE J429 dimensional and mechanical standards, making it appropriate for high-strength bolted assemblies in industrial, mechanical, and trade installations.

This cap screw is used in structural and mechanical assemblies that require a high-strength inch-series fastener. The 7/8-14 fine thread pitch provides superior thread engagement and improved resistance to loosening under vibration compared to coarse-pitch alternatives. Typical applications include heavy equipment maintenance, industrial machinery mounting, and fabrication work where Grade 8 strength is specified by engineering or code. It is sold in multiples of 10 units minimum.

Key Features

• Grade 8 steel construction for high tensile and proof load requirements
• 7/8-14 UNF fine thread for secure engagement and vibration resistance
• 5-inch length under head accommodates deeper joint stacks
• Partially threaded shank handles shear loads and alignment in bolted joints
• Zinc yellow dichromate finish provides baseline corrosion protection
• Meets ASME B18.2.1 and SAE J429 standards for dimensional and mechanical compliance

Compatibility

Designed as a high-strength replacement or service fastener for bolted assemblies specifying a 7/8-14 UNF Grade 8 hex head cap screw with a 5-inch length under head and partial threading per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or trades professional using calibrated torque tooling appropriate for Grade 8 fasteners at the 7/8-14 thread size. Always consult the equipment manufacturer or applicable engineering specification for required torque values before installation. Inspect mating threads for damage or contamination before assembly. Do not substitute a lower-grade fastener in any joint requiring Grade 8 strength.