Value Collection 0407MSR 4-40 X 7/16 Round Head Slotted Machine Screw

Product Description

The VALUE COLLECTION 0407MSR is a 4-40 unified coarse thread machine screw with a round head and slotted drive, manufactured from steel with a zinc finish. At 7/16 inch length under head, this fastener suits light-duty mechanical assemblies where a low-profile round head and simple slotted installation are required. The zinc coating provides basic corrosion resistance for indoor and protected environments. Manufactured to ASME B18.6.3 and SAE J82 standards, the 0407MSR is a Grade J82 fastener appropriate for general-purpose assembly work across a range of trades and manufacturing applications.

This screw is suited for use in electrical enclosures, control panels, HVAC equipment covers, light sheet metal assemblies, and small appliance or instrument housings where a 4-40 thread is specified. The round head profile sits above the workpiece surface and distributes clamping load over a wider bearing area compared to flat head styles. Typically sold in multiples of 100, this fastener is well suited to shops and technicians maintaining stock of common fastener sizes for service and repair work.

Key Features

• 4-40 unified coarse thread for compatibility with standard 4-40 tapped holes and nuts
• 7/16 inch length under head for precise depth control in light assemblies
• Round head profile provides a wider bearing surface on the workpiece
• Slotted drive accepts standard flat-blade screwdrivers
• Zinc finish offers basic corrosion protection for indoor use
• Meets ASME B18.6.3 and SAE J82 dimensional and mechanical standards

Compatibility

Designed as a standard 4-40 machine screw for use in any application requiring a 4-40 tapped hole or mating nut per ASME B18.6.3 inch-series fastener specifications.

Installation Notes

Install using a flat-blade screwdriver sized to fit the slot width to avoid cam-out and head damage. Ensure the mating tapped hole or nut is clean and free of debris before driving. Do not overtighten, as the 4-40 thread size has limited tensile strength and is susceptible to thread stripping in soft materials. Fastener installation in electrical enclosures should comply with applicable NEC requirements for hardware and panel construction.