Value Collection MPRI0-400370-100BX Machine Screw 4-40

Product Description

The VALUE COLLECTION MPRI0-400370-100BX is a 4-40 UNC machine screw designed for light-duty fastening in electrical, mechanical, and electronics assemblies. The round head profile with Phillips drive accepts standard No. 2 Phillips screwdrivers and power drivers. Constructed from Grade 2 steel with a zinc-plated finish, these screws resist corrosion in indoor service environments. The length under head measures 3/8 inches, making them suitable for thin panel and chassis applications. This box contains 100 pieces, sized for recurring shop use or service van stock.

These screws are commonly used in electrical enclosures, control panels, small appliance housings, and light-gauge sheet metal assemblies. HVAC technicians, electricians, and panel fabricators reach for 4-40 fasteners when securing terminal blocks, cover plates, and access panels. The zinc finish makes them a standard choice for indoor environments where mild corrosion resistance is needed without the cost of stainless hardware.

Key Features

• 4-40 UNC thread for compatibility with standard 4-40 tapped holes and nuts
• Round head profile keeps a low installed footprint on thin panels and covers
• Phillips drive works with No. 2 Phillips bits and manual drivers
• Grade 2 steel construction provides adequate strength for light fastening applications
• Zinc-plated finish adds corrosion resistance for indoor service conditions
• 100-piece box quantity supports shop stock and repetitive assembly work

Compatibility

Designed as a standard 4-40 UNC machine screw suitable for any application using 4-40 tapped holes, threaded inserts, or hex nuts in light-duty mechanical and electrical assemblies.

Installation Notes

De-energize all electrical equipment before driving screws into or near live panels or enclosures. Use a properly sized No. 2 Phillips screwdriver or bit to avoid cam-out and head damage. Do not overtighten in plastic housings or thin sheet metal to prevent thread stripping. Follow applicable NEC guidelines when fastening within electrical enclosures.