Value Collection D39067 Hex Cap Screw 3/8-16 X 4-1/2 in Grade 8

Product Description

The Value Collection D39067 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and trade environments. Manufactured from Grade 8 steel and finished with a zinc yellow dichromate coating, this fastener delivers superior tensile strength and corrosion resistance compared to lower-grade hardware. The 3/8-16 thread size follows the Unified National Coarse (UNC) standard, and the 4-1/2-inch length under head suits assemblies requiring extended grip length. Conforming to ASME B18.2.1, this screw is a reliable choice where dimensional accuracy and material traceability are required.

This cap screw is suited for structural and mechanical assemblies in manufacturing, HVAC equipment mounting, electrical panel fabrication, plumbing support structures, and general industrial maintenance. The partial threading allows for a smooth shank section that resists shear loads and aids in accurate part alignment during assembly. Technicians and tradespeople working on heavy-duty equipment where Grade 8 strength is specified by engineering drawings or OEM documentation will find this fastener a direct fit.

Key Features

• Grade 8 steel construction provides high tensile and proof load strength for demanding fastening applications
• Zinc yellow dichromate finish offers corrosion resistance and is visually identifiable as Grade 8
• Partially threaded shank resists shear forces and aids part alignment
• 3/8-16 UNC thread pattern ensures broad compatibility with standard nuts and tapped holes
• Conforms to ASME B18.2.1 for dimensional consistency and quality assurance
• 4-1/2-inch length under head accommodates thicker workpieces and stacked assemblies

Compatibility

Designed for use with standard 3/8-16 UNC nuts, washers, and tapped holes in steel, cast iron, and similar substrates requiring a Grade 8 hex head cap screw per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified tradesperson or mechanic familiar with fastener torque specifications for Grade 8 hardware. Always consult the equipment manufacturer or engineering documentation for the required torque value, as none is specified here. Ensure mating threads are clean and free of debris before installation. Use the appropriate hex wrench or socket to drive the fastener and avoid impact tools that may induce thread galling or overloading.