Value Collection MSPI02500500-100BX 1/4-20 X 1/2 in Pan Head Screw

Product Description

The VALUE COLLECTION MSPI02500500-100BX is a 1/4-20 x 1/2 inch pan head machine screw designed for general-purpose fastening in metal, plastic, and wood assemblies where a pre-tapped hole or mating nut is present. Constructed from Grade 2 steel with a zinc plating finish, these screws resist light corrosion and provide adequate tensile strength for standard mechanical applications. The slotted drive accommodates a flat-blade screwdriver, making them accessible in tight spaces where a bit driver may not fit. This box contains 100 screws, sold as a single package quantity, suited for technicians and tradespeople who need reliable fasteners on hand for service, repair, or panel assembly work.

These machine screws are appropriate for use in light-duty mechanical assemblies, electrical panel work, HVAC equipment housings, plumbing fixture brackets, and similar trade applications. The Unified National Coarse (UNC) thread standard ensures broad compatibility with standard tapped holes and hex nuts. The pan head profile sits low and distributes clamping load across a wide bearing surface, making it a common choice for sheet metal and cover plate installations. Length is measured under the head at 1/2 inch, which is standard for this screw type.

Key Features

• 1/4-20 UNC thread for broad compatibility with standard tapped holes and nuts
• Pan head profile provides wide bearing surface and low-profile seating
• Slotted drive compatible with standard flat-blade screwdrivers
• Grade 2 steel construction meets general-purpose mechanical fastening requirements
• Zinc-plated finish offers light corrosion resistance for indoor and protected environments
• Box of 100 screws packaged for trade and service use

Compatibility

Designed as a standard UNC machine screw for use in any pre-tapped or through-bolted application requiring a 1/4-20 thread and 1/2 inch grip length under the head. Compatible with standard 1/4-20 hex nuts, wing nuts, and tapped holes meeting ASME B1.1 thread specifications.

Installation Notes

Installation is typically performed by any trade professional or technician using a flat-blade screwdriver or appropriate bit driver. Always ensure the mating hole is properly tapped or that a compatible nut is used before driving the screw. Avoid overtightening, which can strip Grade 2 threads or damage the slotted drive recess. When installing in electrical enclosures or energized equipment, follow NFPA 70 (NEC) lockout/tagout procedures and de-energize the equipment before beginning work.