Value Collection 15403PR Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 15403PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assembly, tooling, and industrial maintenance. It features a 1/2-20 UNF thread size, a 2.25-inch length under head, and is driven with a 3/8-inch hex key. Constructed from alloy steel with a black oxide finish, this fastener delivers strong corrosion resistance and meets the dimensional and mechanical standards of ASME/ANSI B18.3, ASTM A574, and IFI 124. Partial threading along the shank provides precise clamping force in bolted joint applications. Machinists, millwrights, and maintenance technicians are the primary installers.

This screw is suited for use in machine tool fixtures, jigs, dies, and general mechanical assemblies where a high-strength, fine-thread fastener is required. The 1/2-20 UNF thread pitch is preferred in applications requiring greater thread engagement per inch compared to coarse-thread fasteners, making it common in precision machinery and vibration-prone environments. The black oxide coating reduces surface reflectivity and provides mild corrosion protection in controlled environments. This part is sold individually with a minimum order quantity of 10 units.

Key Features

• 1/2-20 UNF fine thread for precise clamping and stronger thread engagement
• 2.25-inch length under head with partial threading
• 3/8-inch hex drive for use with standard hex keys or Allen wrenches
• Alloy steel construction for high tensile strength
• Black oxide finish for mild corrosion resistance and low reflectivity
• Meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for use in machine tool, fixture, and general industrial assembly applications requiring a 1/2-20 UNF fine-thread fastener.

Installation Notes

Installation is typically performed by machinists, millwrights, or mechanical maintenance technicians using a 3/8-inch hex key or Allen driver. Ensure the mating threaded hole is clean and free of debris before installation. De-energize and lock out any machinery before servicing fastened assemblies per applicable OSHA lockout/tagout procedures. Do not exceed the rated mechanical load for the fastener grade when determining torque application.