Value Collection D39181 Hex Head Cap Screw 3/4-10 X 4.5in Grade 8

Product Description

The VALUE COLLECTION D39181 is a partially threaded hex head cap screw engineered for high-strength fastening applications in mechanical, structural, and industrial assemblies. Manufactured from Grade 8 steel and finished with a zinc yellow dichromate coating, this fastener delivers a tensile strength well above standard hardware-grade screws and offers enhanced corrosion resistance in demanding environments. The 3/4-10 UNC thread size and 4-1/2 inch length under head make it suitable for thick-stock assemblies where a full-grip shank is required. Conforming to ASME B18.2.1 and SAE J429 standards, this screw meets recognized dimensional and mechanical requirements for critical fastening work.

This fastener is commonly used in heavy equipment maintenance, structural steel connections, machinery mounting, and general industrial fabrication. The partial threading is specifically suited for applications where an unthreaded shank provides a stronger grip through clearance holes or where shear loading is a design consideration. Trades including millwrights, ironworkers, pipefitters, and maintenance mechanics routinely specify Grade 8 hex cap screws in these scenarios. The zinc yellow dichromate finish provides a visual indicator of Grade 8 classification and adds a layer of protection against light corrosion in shop or outdoor environments.

Key Features

• Grade 8 steel construction for high tensile strength in heavy-duty fastening
• Zinc yellow dichromate finish provides corrosion resistance and visual grade identification
• Partially threaded shank suits clearance-hole and shear-load applications
• 3/4-10 UNC thread for broad compatibility with standard inch-system hardware
• Conforms to ASME B18.2.1 and SAE J429 dimensional and mechanical standards

Compatibility

Designed as a standard inch-system hex head cap screw for use with 3/4-10 UNC nuts, washers, and threaded components in structural, mechanical, and industrial assemblies.

Installation Notes

Install using a properly sized hex wrench or socket driver rated for high-strength fasteners. Always use a hardened flat washer under the head when the application requires load distribution across the bearing surface. Verify mating thread condition before installation to avoid galling on the Grade 8 finish. Follow applicable torque specifications from the relevant engineering standard or equipment manufacturer documentation for this thread size and grade.