Value Collection 451119PR Hex Head Cap Screw 1/2-20 X 10 in

Product Description

The VALUE COLLECTION 451119PR is a Grade 8 steel hex head cap screw with a 1/2-20 UNF thread and a 10-inch length under head. It is partially threaded and supplied with a bright, uncoated finish. Grade 8 steel provides high tensile strength, making this fastener suitable for demanding structural and mechanical assembly applications. It conforms to ASME B18.2.1 dimensional standards. A 7/16-inch hex key size is required for installation. This screw is used by mechanical assemblers, millwrights, and maintenance technicians working on heavy equipment, machinery frames, and structural connections that require a high-strength inch-series fastener.

This cap screw is suited for industrial and commercial assembly applications where high-strength fastening is required. The 1/2-20 UNF fine-thread pattern offers good vibration resistance and precise torque control compared to coarse-thread equivalents. The partial threading is typical for longer-length cap screws and allows for full engagement in tapped holes without bottoming out on unthreaded shank sections. Typical installation environments include machine frames, agricultural equipment, heavy-duty brackets, and structural steel assemblies where Grade 8 rated hardware is specified.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/2-20 UNF fine-thread form for precise torque control and vibration resistance
• 10-inch length under head accommodates thick structural members and stacked assemblies
• Partially threaded shank reduces stress concentration along the bolt body
• Bright, uncoated finish suitable for dry indoor environments or where a specific coating will be applied post-installation
• Meets ASME B18.2.1 dimensional standard for interchangeability and inspection

Compatibility

Designed as an OEM-style and replacement fastener for applications specifying a 1/2-20 UNF hex head cap screw in Grade 8 steel per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with high-strength fastener torque procedures. Always confirm the mating tapped hole thread class and material before installation, and ensure the joint design accounts for the uncoated finish where corrosion exposure is a concern. Power down or de-energize any equipment before fastener service. Do not substitute a lower-grade fastener in applications specifying Grade 8 hardware.