Value Collection 011399PR Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 011399PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling, and equipment maintenance. It features a 1/2-20 UNF thread size with a 1-3/4 inch length under head and is fully threaded from head to end. The 3/8 inch hex drive accepts a standard Allen key or hex bit driver. Constructed from alloy steel with a black oxide finish, this fastener resists corrosion and maintains dimensional integrity under load. Licensed trades and maintenance technicians reach for this style of cap screw when securing machine components, fixtures, and structural assemblies where a flush or recessed fastener head is required.

This socket cap screw is suited for precision mechanical and industrial applications where fine-thread engagement is needed. The 1/2-20 UNF thread pitch provides tighter thread spacing than coarse-thread equivalents, making it appropriate for applications requiring precise clamping force control or use in harder materials. It is commonly installed in manufacturing equipment, hydraulic components, pump housings, and general mechanical assemblies by machinists, millwrights, and maintenance technicians working to ASME and ASTM fastener standards.

Key Features

• 1/2-20 UNF fine thread for precise clamping and use in hard materials
• 1-3/4 inch length under head, fully threaded for maximum thread engagement
• 3/8 inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction for high tensile strength and durability
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-service fastener for mechanical assemblies requiring 1/2-20 UNF socket cap screws conforming to ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 3/8 inch hex key or hex drive bit. Always de-energize, depressurize, or otherwise make safe any assembly before removing or replacing fasteners. Do not mix UNF and UNC thread fasteners in the same tapped hole. Verify thread engagement length and mating material hardness before installation to avoid stripping or galling.