Value Collection 353-5404-01 Button Socket Cap Screw 4-40

Product Description

The VALUE COLLECTION 353-5404-01 is a 4-40 x 1/4 inch button socket cap screw machined from alloy steel and finished with a black oxide coating. The button head profile provides a low-profile bearing surface suited for applications where clearance is limited. Drive engagement is via a Torx Plus IP8 recess, which reduces cam-out compared to hex socket drives. The fastener is fully threaded to ANSI/ASME B18.3 and ASTM F835 standards, with a 3A thread fit class and right-hand UNRC thread form. Hardness is rated at 39 to 44 HRC. This screw is used by machinists, assembly technicians, and maintenance trades across industrial and precision mechanical applications.

This fastener is suited for light-duty mechanical assemblies, enclosures, fixtures, and panels where a low-profile head and positive Torx Plus drive engagement are required. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it appropriate for tooling, instrument panels, and equipment housings. The 4-40 thread size is common in small mechanical assemblies, electronics enclosures, and precision equipment. This item is sold individually but carries a minimum order quantity of 100 units.

Key Features

• Torx Plus IP8 drive recess reduces cam-out and improves torque transfer
• Low-profile button head suits clearance-restricted assemblies
• Alloy steel construction with 39 to 44 HRC hardness rating
• Black oxide finish provides mild corrosion resistance and low reflectivity
• Fully threaded 3A UNRC right-hand thread for consistent fit and engagement
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 4-40 UNC button socket cap screw compatible with tapped holes conforming to UNRC 3A thread specifications in light mechanical, electronic, and precision equipment assemblies.

Installation Notes

Installation is performed by machinists or assembly technicians using a Torx Plus IP8 driver or bit. Verify the mating tapped hole is clean, undamaged, and cut to UNRC 3A specifications before installation. Do not use a standard Torx T8 driver in place of the IP8 recess, as this can damage the drive recess or reduce torque capacity. Power down and de-energize any equipment before accessing fasteners on live assemblies or enclosures.