Value Collection 354-5404-01 Flat Socket Cap Screw 4-40

Product Description

The VALUE COLLECTION 354-5404-01 is a 4-40 x 1/4 inch flat socket cap screw designed for precision fastening applications where a flush or countersunk profile is required. Manufactured from alloy steel with a black oxide finish, this screw offers good hardness and corrosion resistance in low-moisture environments. The Torx Plus T10 drive reduces cam-out during installation and allows higher torque transfer compared to standard hex socket drives. The 82-degree flat head seats flush with the mating surface. Fully threaded along its 1/4 inch overall length, the 4-40 UNC thread pattern suits fine-pitch metric and inch-standard assemblies common in electronics, instrumentation, and light mechanical work.

This screw is suited for applications requiring a low-profile fastener in tight assemblies, including electronic enclosures, instrument panels, fixtures, and precision mechanical components. The 4-40 thread size is widely used in small-scale fabrication and OEM assembly environments. Sold individually, with a minimum order quantity of 100 pieces, this part is appropriate for production runs, maintenance kits, or restocking trade fastener inventories.

Key Features

• 82-degree flat head provides a flush countersunk seating profile
• Torx Plus T10 drive reduces cam-out and supports higher installation torque
• Alloy steel construction for strength in precision fastening applications
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Fully threaded 4-40 UNC over 1/4 inch overall length
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard inch-series flat socket cap screw compatible with any 4-40 UNC tapped hole or nut requiring an 82-degree countersunk flat head seating geometry.

Installation Notes

Installation is performed with a Torx Plus T10 driver or bit; do not substitute a standard Torx T10 bit where a Torx Plus drive is specified, as this can damage the drive recess. Verify the mating countersink is machined to an 82-degree included angle before installing. De-energize and discharge any assembly before installing fasteners in electrical or electronic enclosures per applicable NEC guidelines. Do not over-torque alloy steel screws in soft substrate materials such as aluminum or plastic.