Value Collection 307239BR Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION 307239BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It carries a 1-8 UNC thread size and measures 3.5 inches in length under the head. The drive is a 5/8 inch hex socket, requiring a standard hex key or Allen driver for installation. Manufactured from alloy steel and finished with a black oxide coating, this screw meets ASTM A574 specifications, which define mechanical requirements for high-strength socket cap screws. It weighs 0.05 pounds.

This screw is suited for use in machinery, tooling fixtures, equipment frames, and general industrial assemblies where a flush or recessed fastener head is required. The partial threading allows for improved clamping force in through-bolt applications. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it appropriate for both indoor mechanical and controlled-environment applications. It is commonly installed by machinists, millwrights, and maintenance technicians.

Key Features

• 1-8 UNC thread size for high-load fastening in standard inch-series tapped holes
• 3.5 inches length under head for use in deeper through-bolt or clearance-hole applications
• 5/8 inch hex socket drive for precise torque application with standard hex tools
• Partially threaded shank improves clamping force in through-bolt assemblies
• Alloy steel construction meets ASTM A574 high-strength socket cap screw standards
• Black oxide finish provides mild corrosion resistance and a low-reflectance appearance

Compatibility

Designed as a standard ASTM A574 hex socket cap screw for use in any inch-series application requiring a 1-8 UNC thread and a 3.5 inch grip length.

Installation Notes

Installation is performed with a 5/8 inch hex key or Allen driver. Ensure the mating tapped hole is clean and free of debris before threading. Power down or de-energize any equipment before performing fastener service on live machinery. Follow applicable facility maintenance procedures and torque guidelines for ASTM A574 socket cap screws as specified by the equipment manufacturer or relevant engineering standards.