Value Collection D39153 Hex Cap Screw 5/8-11 X 3 in Grade 8

Product Description

The VALUE COLLECTION D39153 is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 5/8-11 UNC thread size and a 3-inch length under head, manufactured from Grade 8 steel for demanding load-bearing use. The zinc yellow dichromate finish provides corrosion resistance and is a standard identifier for Grade 8 fasteners. Compliance with ASME B18.2.1 confirms dimensional accuracy and interchangeability. This screw is installed by maintenance technicians, millwrights, pipefitters, and general contractors working on equipment requiring high-tensile fasteners.

This cap screw suits a wide range of heavy-duty bolted connections where partial threading is required to create a smooth shank bearing surface between clamped components. Common applications include machinery frames, structural steel connections, HVAC equipment mounting, and industrial equipment assembly. The 5/8-11 coarse thread pattern provides strong thread engagement in steel and cast-iron tapped holes, making it a reliable choice for both original equipment assembly and field repairs.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Partially threaded shank provides a bearing surface for precise clamping
• Zinc yellow dichromate finish offers corrosion resistance and Grade 8 identification
• 5/8-11 UNC thread standard ensures wide compatibility with standard nuts and tapped holes
• Meets ASME B18.2.1 dimensional standards for consistent fit and interchangeability
• Inch measurement system for use with standard American fastener hardware

Compatibility

Designed as a standard inch-series hex head cap screw compatible with 5/8-11 UNC tapped holes and standard heavy hex or finished hex nuts conforming to ASME specifications.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or trades professional using calibrated torque equipment appropriate for Grade 8 fasteners. Always verify that mating threads and tapped holes are clean, undamaged, and free of debris before assembly. Do not substitute a lower-grade nut or tapped material that is incompatible with Grade 8 clamp loads. Follow applicable equipment manufacturer torque specifications and relevant industry standards for the application.