Value Collection -40216-9 Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION -40216-9 is a hex socket cap screw designed for precision fastening in mechanical assemblies, maintenance applications, and equipment fabrication. Sized at 1/4-28 UNF with a 3/8-inch length under head, this fastener is fully threaded and driven with a 3/16-inch hex key. The alloy steel construction is finished with a black oxide coating, which provides mild corrosion resistance and reduces light reflection. This screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for applications where dimensional accuracy and tensile performance are required.

This socket cap screw is commonly used in close-clearance installations where a standard hex bolt head would not fit. Typical applications include machine frames, fixtures, tooling plates, equipment panels, and mechanical assemblies across industrial, HVAC, electrical, and plumbing trade environments. The fine 1/4-28 UNF thread pitch provides stronger thread engagement in thinner materials compared to coarse-thread equivalents, and the socket drive allows installation with a standard hex wrench or Allen key in confined spaces.

Key Features

• 1/4-28 UNF fine thread for high thread engagement in thin or tapped metal sections
• 3/8-inch length under head, fully threaded along entire shank
• 3/16-inch hex socket drive for use with standard Allen wrenches or hex bit drivers
• Alloy steel construction meets ASTM A574 tensile requirements
• Black oxide finish provides mild corrosion resistance and low-reflectance appearance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 socket cap screw suitable for any tapped or clearance hole application requiring a 1/4-28 UNF fine-thread fastener.

Installation Notes

Installation is performed with a 3/16-inch hex key or Allen driver. Ensure mating threads are clean and free of debris before driving. Apply thread locker or anti-seize compounds as required by the application. Do not exceed the rated torque capacity of the alloy steel fastener; consult applicable mechanical or equipment service documentation for torque specifications.