Value Collection 33677 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The VALUE COLLECTION 33677 is a partially threaded hex socket cap screw designed for secure, high-strength fastening in industrial and mechanical assemblies. Sized at 1/2-13 UNC thread with a 5.5-inch length under head, it accepts a 3/8-inch hex drive. The alloy steel construction provides high tensile strength, and the black oxide coating offers mild corrosion resistance while reducing surface reflectivity. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it a recognized choice for load-bearing applications where dimensional and mechanical compliance is required.

This cap screw is suited for general industrial, mechanical, and structural fastening tasks where a recessed hex drive is preferred for torque application in tight clearances. Typical applications include machine frames, jigs, fixtures, tooling plates, and equipment assemblies. The partial threading allows for precise clamping without thread engagement through the full grip length, which is useful when securing thick material stacks or components that require a smooth shank section.

Key Features

• 1/2-13 UNC thread size for compatibility with standard fractional inch fastener systems
• 5.5-inch length under head provides extended grip for thick material stacks
• Partially threaded shank for accurate clamping and smooth grip zone
• 3/8-inch hex socket drive for use with standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide finish provides mild corrosion resistance and low-glare surface

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 1/2-13 UNC partially threaded fastener with a 5.5-inch length under head.

Installation Notes

Installation is typically performed by a machinist, millwright, or maintenance technician using a calibrated hex key or hex bit socket. De-energize and lock out any equipment before servicing fastened assemblies. Ensure tapped holes are clean and free of debris before threading in the screw. Do not exceed the rated drive engagement depth for the 3/8-inch hex socket to avoid drive recess damage.