Value Collection 40259 Hex Socket Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 40259 is a hex socket cap screw designed for fastening applications that require a compact drive recess and high tensile strength. Built from alloy steel with a black oxide finish, this screw measures 1-3/4 inches in length under the head and carries a 1/2-20 UNF thread form with full threading along its length. The 3/8 inch hex drive accepts a standard Allen key or hex bit driver. It meets ASME/ANSI B18.3 and ASTM A574 fastener standards, making it a reliable choice for mechanical assemblies, industrial equipment, and trade-grade repair work where precision threading and corrosion resistance matter.

This screw is suited for general mechanical and industrial applications requiring a fine-thread UNF fastener. The 1/2-20 UNF thread pitch provides finer thread engagement than coarse-thread equivalents, which is advantageous in applications where vibration resistance or precise torque control is needed. Typical install scenarios include machinery assemblies, tooling fixtures, and equipment enclosures. Sold in a minimum order quantity of 25 pieces, this part is appropriate for technicians, maintenance professionals, and shop operations that need consistent, specification-grade hardware on hand.

Key Features

• 1/2-20 UNF fully threaded for maximum thread engagement along the entire shank
• Alloy steel construction meets ASTM A574 for high-strength fastener performance
• Black oxide finish provides mild corrosion resistance and reduced light reflection
• 3/8 inch hex socket drive compatible with standard Allen wrenches and hex bit drivers
• Conforms to ASME/ANSI B18.3 dimensional standards for consistent fit

Compatibility

Designed as a standard-dimension UNF hex socket cap screw suitable for use in any application calling for a 1/2-20 UNF fully threaded fastener per ASME/ANSI B18.3.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a calibrated torque wrench and the appropriate 3/8 inch hex key or driver bit. Ensure mating threads are clean and free of debris before installation. Always verify thread compatibility and material compatibility with the mating component before final assembly. Follow applicable industry standards and equipment manufacturer torque specifications for the assembly being serviced.