Value Collection MPFI0-401000-100BX 4-40x1 Flat Head Screw

Product Description

The VALUE COLLECTION MPFI0-401000-100BX is a 4-40 x 1 inch flat head Phillips machine screw sold in a box of 100. Made from Grade 2 steel with a zinc-plated finish, this screw is designed for general-purpose fastening in light-duty applications. The flat head profile sits flush with or below the mating surface when countersunk correctly. The Phillips drive allows installation with standard screwdrivers or power tools equipped with a Phillips bit. The Unified National Coarse (UNC) thread form provides reliable thread engagement across a wide range of materials. Overall length is 1 inch and length under head is also 1 inch, consistent with a flat head design measured from tip to top of head.

This screw is suited for sheet metal, plastic enclosures, electronic assemblies, and light structural applications where a flush fastener profile is required. The zinc plating provides baseline corrosion resistance for indoor or sheltered environments. At 4-40 threading, this fastener is commonly found in control panels, instrumentation housings, electrical enclosures, and small equipment assemblies. The box quantity of 100 supports production, maintenance, and repair work where consistent supply of a single fastener specification is needed.

Key Features

• 4-40 UNC thread for broad compatibility with standard tapped holes in that size
• Flat head design sits flush when installed in a properly countersunk hole
• Phillips drive compatible with standard screwdrivers and power tools
• Grade 2 steel construction for general-purpose light-duty fastening
• Zinc-plated finish provides basic corrosion resistance in dry or sheltered settings
• Sold in a box of 100 to support production and maintenance quantities

Compatibility

Designed as a standard 4-40 UNC flat head Phillips machine screw for use in any application requiring that thread size, head style, and drive type combination. Suitable for use with standard 4-40 tapped holes or hex nuts in steel, aluminum, and plastic assemblies.

Installation Notes

Installation is performed by hand with a Phillips screwdriver or a power driver fitted with the appropriate Phillips bit. Countersink the mating material to the correct flat head angle before driving to achieve a flush finish and avoid surface cracking or screw damage. Do not overtighten, as Grade 2 steel has lower tensile strength than higher-grade fasteners. Follow applicable standards such as ASME B18.6.3 for machine screw installation torque guidelines based on material and application.