Value Collection 0405MSP 4-40 X 5/16 Pan Head Slotted Machine Screw

Product Description

The VALUE COLLECTION 0405MSP is a 4-40 pan head machine screw designed for fastening applications that require a fine threaded, small-diameter fastener with a low-profile head. Manufactured from steel with a zinc finish, this screw meets ASME B18.6.3 and SAE J82 standards for dimensional accuracy and material grade. The slotted drive accepts a standard flathead screwdriver, making it a reliable choice for light-duty assembly work in electronics, instrumentation, and general fabrication. Each unit measures 5/16 inches in length under the head and ships in minimum order quantities of 100 pieces.

This screw is suited for residential and commercial applications where a 4-40 threaded fastener is specified. Common use cases include securing panels, enclosures, terminal blocks, and small mechanical assemblies. The pan head profile distributes clamping load over a wider bearing surface than flat or oval head styles, making it appropriate for sheet metal, plastic, and thin-material fastening without a washer. Electricians, instrumentation technicians, and general assembly mechanics routinely use this fastener in control panel and enclosure work.

Key Features

• 4-40 thread size provides fine thread engagement suitable for tapped holes in thin materials
• Pan head profile offers a wide bearing surface without requiring a separate washer
• Slotted drive compatible with standard flathead screwdrivers and bits
• Steel construction with zinc finish provides corrosion resistance for general indoor use
• Meets ASME B18.6.3 and SAE J82 fastener standards for dimensional conformance
• Sold in multiples of 100, suitable for production assembly and service stock

Compatibility

Designed as a standard inch-series machine screw for use in any application specifying a 4-40 threaded fastener with a pan head and slotted drive per ASME B18.6.3.

Installation Notes

Installation is performed by hand or with a standard flathead screwdriver sized to the slot. Always verify the mating tapped hole or threaded insert is the correct 4-40 thread specification before driving the screw. Do not overtighten in plastic or soft-material tapped holes, as the fine thread is susceptible to stripping under excessive torque. Power down or de-energize any assembly before installing fasteners in live electrical enclosures.