Value Collection -40869-3 Button Socket Cap Screw 1/4-28

Product Description

The VALUE COLLECTION -40869-3 is a button socket cap screw designed for applications requiring a low-profile head and secure hex socket drive. Sized at 1/4-28 UNF thread with a 3/4-inch length under head, this screw is fully threaded and features a 5/32-inch hex socket drive. Manufactured from alloy steel with a black oxide finish, it delivers corrosion resistance and a hardness rating of 36-43 HRC. Conforming to ANSI/ASME B18.3 and ASTM F835 standards, it is suitable for precision mechanical assemblies and structural fastening tasks where head clearance is limited. This package contains 50 pieces.

This button socket cap screw is used in machinery, fixtures, tooling, and mechanical assemblies where a rounded, low-profile head is preferred over a traditional hex cap or flat head. The UNF 1/4-28 thread pitch makes it well-suited for fine-thread applications that require higher clamp loads or vibration resistance. Installed by machinists, maintenance technicians, and mechanical assemblers, it fits standard hex socket tooling and is commonly used in both light industrial and OEM production environments.

Key Features

• 1/4-28 UNF fully threaded, 3/4-inch length under head with low-profile button head
• 5/32-inch hex socket drive for standard Allen key or hex bit installation
• Alloy steel construction with black oxide coating for surface protection
• Hardness rated 36-43 HRC for high-strength fastening applications
• Thread fit Class 3A for tight dimensional tolerances
• Conforms to ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 1/4-28 UNF button socket cap screw conforming to ANSI/ASME B18.3 and ASTM F835, suitable for use in any application requiring a compatible thread size, fit class, and head style.

Installation Notes

Install using a 5/32-inch hex key or socket bit driver; ensure the mating threaded hole is clean and free of debris before installation. Verify thread engagement depth meets application load requirements before torquing. Always follow applicable mechanical assembly standards and equipment manufacturer guidelines when specifying fastener torque values. Inspect for proper seating of the button head against the mating surface after installation.