Value Collection MSPI0-401500-100B 4-40 Pan Head Slotted Screw

Product Description

The VALUE COLLECTION MSPI0-401500-100B is a 4-40 x 1.5-inch pan head machine screw with a slotted drive, manufactured from steel with a zinc finish. Conforming to ASME B18.6.3 and SAE J82 standards, this fastener delivers consistent thread engagement and dimensional accuracy for light mechanical assemblies. The zinc coating provides basic corrosion resistance in general-purpose applications. Sold in a minimum order quantity of 100 pieces, this screw is suited for production assembly, maintenance repair, and instrumentation work where a compact, standardized fastener is required.

This machine screw is used in residential and light commercial applications involving electronics enclosures, instrument panels, sheet metal assemblies, HVAC controls, and electrical equipment. The 4-40 thread series is a standard unified inch coarse thread widely specified in control boards, junction box hardware, and small equipment mounting. The pan head profile provides a low-clearance bearing surface without a countersink requirement, making it a common choice in tight-tolerance assemblies. Installation is performed by electricians, HVAC technicians, and general maintenance technicians.

Key Features

• 4-40 unified inch coarse thread for broad compatibility with standard tapped holes
• 1.5-inch length under head provides sufficient thread engagement across a range of material thicknesses
• Pan head geometry offers a wide bearing surface without requiring a countersink
• Slotted drive compatible with standard flat-blade screwdrivers
• Zinc finish provides basic corrosion resistance for indoor and sheltered applications
• Meets ASME B18.6.3 and SAE J82 dimensional and material standards

Compatibility

Designed as an OEM-style replacement or service fastener for any application specifying a 4-40 x 1.5-inch pan head slotted machine screw per ASME B18.6.3.

Installation Notes

Installation requires a properly sized flat-blade screwdriver to avoid cam-out and slot damage. Verify the mating tapped hole or nut is clean and free of debris before driving. Power down any electrical or control equipment before servicing fasteners in live panels or enclosures. Do not over-torque; steel zinc-plated screws in small thread series are susceptible to thread stripping if driven beyond hand-tight plus a controlled final turn.