Value Collection D39180 Hex Head Cap Screw 3/4-10 X 4 in Grade 8

Product Description

The VALUE COLLECTION D39180 is a Grade 8 hex head cap screw with a 3/4-10 UNC thread and a 4-inch length under the head. It is manufactured from alloy steel and finished with a zinc yellow dichromate coating that provides corrosion resistance and a distinctive yellow appearance for easy identification. The shank is partially threaded, making it suited for applications that require a grip length or bearing surface between clamped components. This fastener meets ASME B18.2.1 dimensional standards and is installed by millwrights, maintenance technicians, and mechanical contractors in structural and mechanical assemblies.

This screw is used in heavy-duty mechanical and structural applications where Grade 8 tensile strength is required. Typical uses include machinery mounting, heavy equipment assembly, jig and fixture fabrication, and general industrial maintenance. The partially threaded configuration is particularly useful in bolted joints where shank engagement through a clearance hole is needed before threading into a tapped hole or nut. It is sold in multiples of 10.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 3/4-10 UNC thread form with partial threading for grip-length applications
• 4-inch length under head for deep-reach or stacked-component assemblies
• Zinc yellow dichromate finish provides corrosion resistance and visual identification
• Conforms to ASME B18.2.1 for dimensional consistency and interchangeability
• Inch measurement system; length measured under the head

Compatibility

Designed as a standard-dimension replacement or new-installation fastener for any application requiring a 3/4-10 UNC Grade 8 hex head cap screw per ASME B18.2.1 specifications.

Installation Notes

Installation is performed by qualified maintenance technicians or mechanical contractors using a standard 1-1/8-inch hex wrench or impact driver with the appropriate socket. Always ensure mating threads are clean and free of debris before assembly. Follow applicable torque specifications from the equipment manufacturer or a Grade 8 fastener torque reference for the 3/4-10 thread size. Do not substitute a lower-grade fastener in any joint designed for Grade 8 hardware.