Value Collection MSPI0-500250-100BX Machine Screw 5-40

Product Description

The VALUE COLLECTION MSPI0-500250-100BX is a 5-40 UNC machine screw designed for general fastening applications across mechanical, electrical, and light fabrication work. It features a pan head profile with a slotted drive, allowing installation with a standard flat-blade screwdriver. Constructed from Grade 2 steel with a zinc-plated finish, this screw provides basic corrosion resistance suitable for indoor and sheltered environments. The screw measures 1/4 inch in length under the head, making it appropriate for shallow through-hole and tapped-hole applications where a low-profile head and controlled depth are needed. Sold in a box quantity of 100.

This fastener is suited for residential and light commercial applications including electrical panel assembly, control board mounting, enclosure hardware, HVAC component brackets, and similar low-load fastening tasks. The 5-40 thread designation indicates a No. 5 diameter with 40 threads per inch on a Unified National Coarse pitch, commonly found in pre-tapped holes on sheet metal enclosures and small mechanical assemblies. It is typically installed by electricians, HVAC technicians, and mechanical assemblers who work with standard UNC threaded hardware.

Key Features

• 5-40 UNC thread for compatibility with standard inch-series tapped holes
• Pan head profile provides a low-profile, wide-bearing surface without a washer requirement
• Slotted drive accepts standard flat-blade screwdrivers
• Grade 2 steel construction for general-purpose fastening duty
• Zinc-plated finish offers basic corrosion resistance for indoor use
• Sold in a 100-piece box quantity for jobsite stocking

Compatibility

Designed as a general-purpose UNC machine screw for use in pre-tapped or through-hole applications requiring a 5-40 inch-series thread pattern.

Installation Notes

Install using a flat-blade screwdriver sized to the slot width; an oversized or undersized driver blade can damage the slot or surrounding material. Do not exceed the torque capacity of Grade 2 fasteners — these are not rated for high-load structural connections. Ensure the mating tapped hole is clean and free of debris before threading. De-energize any electrical equipment fully before installing or removing fasteners on live panels or control boards.