Value Collection MPPI0-400500-100BX 4-40 X 0.5 in Pan Head Screw

Product Description

The VALUE COLLECTION MPPI0-400500-100BX is a 4-40 x 0.5-inch pan head machine screw designed for precision fastening in light-duty mechanical and electrical assemblies. Manufactured from Grade 2 steel with a zinc-plated finish, this screw provides reliable corrosion resistance in indoor and controlled environments. The Phillips drive allows for fast installation with standard hand tools or power drivers. The length is measured from under the head, giving a full 0.5 inches of thread engagement. Sold in a box of 100, this fastener suits production runs, panel builds, and service work requiring consistent, repeatable hardware.

This machine screw is suited for applications in electrical enclosures, control panels, HVAC equipment housings, light mechanical assemblies, and general sheet metal or tapped-hole fastening. The 4-40 UNC thread is a standard coarse-pitch size widely used in instrument and electronics assembly. Installers working on terminal boards, fan motor mounting brackets, and access panel hardware will find this size common across residential and commercial equipment. The pan head profile seats flush against flat surfaces without countersinking, making it a practical choice for thin-gauge metal and plastic substrates.

Key Features

• 4-40 UNC thread for compatibility with standard tapped holes in light mechanical and electrical assemblies
• 0.5-inch length measured from under the head for predictable thread engagement depth
• Grade 2 steel construction provides adequate tensile strength for light-duty fastening applications
• Zinc-plated finish offers corrosion resistance in indoor and low-humidity environments
• Pan head profile distributes clamp load over a wide bearing surface without countersinking
• Phillips drive accepts standard No. 1 Phillips bits for hand or power installation

Compatibility

Designed as an OEM-style replacement or service stock fastener for any application requiring a 4-40 UNC, 0.5-inch pan head Phillips machine screw in inch-measurement systems.

Installation Notes

Installation requires a No. 1 Phillips screwdriver or compatible power bit. Always de-energize electrical equipment before servicing panels or enclosures where these screws are used. Avoid overtorquing into tapped plastic or thin-gauge sheet metal to prevent thread stripping. Confirm the receiving hole is tapped to 4-40 UNC before driving the fastener.