Value Collection D39219 Hex Head Cap Screw Grade 8 Steel

Product Description

The VALUE COLLECTION D39219 is a Grade 8 steel hex head cap screw with a 1-8 UNC thread size and a 3.5-inch length under head. It features a zinc yellow dichromate finish that provides corrosion resistance in demanding service environments. The screw is partially threaded and manufactured to ASME B18.2.1 standards, making it a reliable choice for structural and mechanical fastening applications. Licensed tradespeople, maintenance mechanics, and industrial assemblers reach for Grade 8 hardware when high tensile strength and dimensional consistency are required on critical joints.

This fastener suits a wide range of heavy-duty assembly applications including machinery mounting, structural steel connections, equipment frames, and general industrial maintenance. Its inch-series UNC thread pattern is compatible with standard tapped holes and hex nuts across residential and commercial mechanical installations. The zinc yellow dichromate coating makes it well-suited for indoor and semi-exposed environments where moderate corrosion protection is needed alongside high clamping load requirements.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1-8 UNC thread standard ensures compatibility with standard inch-series tapped holes and nuts
• Partially threaded shank provides a bearing surface for shear-loaded joints
• Zinc yellow dichromate finish delivers corrosion resistance without sacrificing torque control
• Manufactured to ASME B18.2.1 for dimensional accuracy and consistency
• 3.5-inch length under head accommodates thicker material stackups

Compatibility

Designed as an OEM-style replacement or general-use Grade 8 hex head cap screw for inch-series UNC threaded assemblies in industrial, mechanical, and structural applications.

Installation Notes

Installation should be performed by qualified mechanics or tradespeople familiar with fastener torque specifications for Grade 8 hardware. Always clean and inspect the mating threaded hole before installation and confirm thread engagement depth meets design requirements. Use a calibrated torque wrench and apply torque values appropriate for the specific joint design and lubrication condition. Do not substitute Grade 8 fasteners with lower-grade hardware in structural or high-load applications.