Value Collection 33668 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The VALUE COLLECTION 33668 is a partially threaded hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and structural assemblies. It carries a 1/2-13 UNC thread size with a 2.5-inch length under the head and accepts a 3/8-inch hex drive. Constructed from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and mechanical strength in demanding service environments. Installation is performed with a standard hex key or Allen-type driver. The black oxide coating reduces light reflection and provides a layer of surface protection against moisture and mild corrosion.

This screw is suited for use in machinery, fixtures, tooling plates, and fabricated assemblies where a flush or recessed fastener head is required. Partial threading allows the unthreaded shank to bear shear loads, making it appropriate for precision-fit applications. Trades and manufacturing professionals specify this style of cap screw when torque retention and controlled clamping force are critical. The ASME/ANSI B18.3 and ASTM A574 standards governing this fastener confirm its dimensional and mechanical compliance for professional use.

Key Features

• 1/2-13 UNC thread size for broad compatibility with standard tapped holes
• 2.5-inch length under head suits moderate-depth fastening applications
• Partially threaded shank supports shear load in precision assemblies
• 3/8-inch hex socket drive for use with standard Allen keys or hex-bit drivers
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide finish provides mild corrosion resistance and low-reflectance appearance

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 compliant hex socket cap screw for use in any application requiring a 1/2-13 UNC partially threaded fastener with a 3/8-inch hex drive.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a calibrated torque wrench with a hex-bit socket. De-energize and lock out any equipment before installing or removing fasteners in powered assemblies. Do not exceed the rated torque for the thread size and material grade. Inspect the tapped hole for debris and proper thread condition before seating the fastener.