Value Collection 15389PR Hex Socket Cap Screw 1/2-13 Unc

Product Description

The VALUE COLLECTION 15389PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assembly, fabrication, and industrial maintenance. Featuring a 1/2-13 UNC thread size and a 7-inch length under head, this screw is partially threaded to allow proper clamping force in through-bolt applications. The 3/8-inch hex drive accepts standard Allen keys and hex bit drivers. Constructed from alloy steel with a black oxide finish, it delivers corrosion resistance and a clean, low-reflectance appearance suited for both interior and exterior mechanical assemblies. Machinists, maintenance technicians, and fabricators are the typical end users.

This cap screw is suited for general industrial and mechanical fastening applications where high tensile strength and a recessed drive profile are required. The partial threading is appropriate for applications where the unthreaded shank must pass through a clearance hole before engaging a tapped bore or nut. Common install scenarios include machine frames, fixture plates, tooling, and structural steel assembly. The black oxide finish reduces friction during installation and provides mild oxidation protection in dry or lightly oiled environments.

Key Features

• 1/2-13 UNC thread form for compatibility with standard unified coarse-thread tapped holes and nuts
• 7-inch length under head accommodates deep through-bolt and stack-up applications
• Partially threaded shank provides full clamping action without thread engagement along the grip length
• 3/8-inch hex socket drive for use with Allen wrenches or hex bit driver sockets
• Alloy steel construction meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards for high-strength socket cap screws
• Black oxide coating reduces surface friction and provides mild corrosion inhibition

Compatibility

Designed as an OEM-style replacement or standard service fastener for industrial assemblies, machine tooling, and structural applications requiring a 1/2-13 UNC partially threaded hex socket cap screw.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 3/8-inch hex key or Allen bit driver. Always ensure the mating tapped hole or nut meets the 1/2-13 UNC specification before installation. Torque to the appropriate value for the joint material and grade per ASME or applicable fastener standards — do not exceed the rated tensile load of the screw or the yield strength of the joint material. Inspect threads on both the screw and the receiving bore for damage or contamination before installation.