Value Collection 353-5408-01 Button Socket Cap Screw 4-40

Product Description

The VALUE COLLECTION 353-5408-01 is a 4-40 x 1/2 inch button socket cap screw designed for fastening applications that require a low-profile head with high torque transfer. Manufactured from alloy steel with a black oxide finish, this screw offers corrosion resistance and a clean, matte appearance suited for light-duty and precision assemblies. The Torx Plus IP8/TP8 drive reduces cam-out and allows consistent torque application in tight spaces. With a hardness rating of 39-44 HRC and a 3A thread fit class, this fastener meets ANSI/ASME B18.3 and ASTM F835 standards. It is fully threaded with a right-hand UNRC thread form.

This screw is used in light mechanical assemblies, electronics enclosures, instrumentation panels, and precision equipment where a flush or near-flush head profile is required. The button head style provides a wider bearing surface than a standard socket head, distributing load without the need for a washer in many applications. Machinists, assembly technicians, and maintenance professionals working in industrial, OEM, and field-service environments commonly specify this fastener. It is sold individually but requires a minimum order quantity of 100 pieces.

Key Features

• Torx Plus IP8/TP8 drive minimizes cam-out and supports high torque transfer in confined spaces
• Alloy steel construction with black oxide coating for corrosion resistance and low-glare finish
• Hardness of 39-44 HRC for reliable clamping strength in demanding assemblies
• 3A thread fit class with right-hand UNRC thread form for precise, consistent engagement
• Fully threaded 4-40 x 1/2 inch body for maximum thread engagement in thin stock
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 4-40 button socket cap screw for use in any application requiring a UNRC 4-40 thread and a Torx Plus IP8/TP8 drive tool.

Installation Notes

Installation requires a Torx Plus IP8 or TP8 bit; standard Torx T8 bits are not recommended as they may not fully seat in the Torx Plus recess. Ensure mating threads are clean and free of debris before driving. Apply appropriate torque per your assembly specification — do not exceed the design load for a 4-40 alloy steel fastener. Thread locking compound may be applied to the threads if vibration resistance is required in the application.