Value Collection 0420MPR 4-40 X 1.25 in Round Head Phillips Screw

Product Description

The VALUE COLLECTION 0420MPR is a 4-40 UNC machine screw designed for precision fastening applications in light mechanical assemblies, electrical enclosures, and instrumentation work. The round head profile with Phillips drive provides a low-profile clamping surface and straightforward installation with standard tooling. Manufactured from steel with a zinc finish for basic corrosion resistance, this screw meets ASME B18.6.3 and SAE J82 dimensional and material standards. The 1.25-inch length under head is suited for securing thin panels, terminal strips, and chassis components where a smaller thread pitch offers reliable engagement in tapped holes or with mating nuts.

This screw is appropriate for residential and commercial electrical, HVAC control panel, and light-duty mechanical assembly environments. The 4-40 thread size is common in control boards, junction box hardware, fan blade brackets, and instrument housings across HVAC, refrigeration, and electrical trades. The zinc finish provides a measure of protection against mild atmospheric corrosion, making it suitable for indoor and sheltered installations. This SKU is sold as a minimum order quantity of 100 pieces per order, making it practical for bench stock and service van inventory.

Key Features

• 4-40 UNC thread size for compatibility with standard tapped holes and 4-40 hex nuts
• 1.25-inch length under head for moderate-depth fastening through panels and brackets
• Round head with Phillips drive for use with standard Phillips screwdrivers and bits
• Steel construction to Grade J82 with zinc finish for strength and basic corrosion resistance
• Conforms to ASME B18.6.3 and SAE J82 fastener standards
• No washer style, reducing total installed height in tight clearance applications

Compatibility

Designed as a standard 4-40 UNC machine screw for use in any application requiring this thread size and head configuration; verify thread engagement depth and clearance before installation.

Installation Notes

Installation is performed by hand tool or power driver using a Phillips bit sized for a number 4 screw. Always verify the tapped hole or mating nut is the correct 4-40 thread specification before driving. Do not overtighten into soft materials such as aluminum or plastic, as the small thread diameter is susceptible to stripping. Power down any electrical equipment before fastening hardware inside enclosures or control panels.