Value Collection 0408MSL 4-40 X 0.5 in Fillister Slotted Screw

Product Description

The VALUE COLLECTION 0408MSL is a 4-40 unified coarse thread machine screw designed for light-duty mechanical fastening applications in metal, plastic, and composite assemblies. It features a fillister head profile with a slotted drive, a 0.5-inch length under head, and a zinc-plated steel construction. Manufactured to ASME B18.6.3 and SAE J82 standards, this screw is a standard choice for instrumentation, panel work, and precision equipment assembly. It ships in a minimum order quantity of 100 pieces per package, making it suitable for shop stock or production-run replenishment.

This screw is used across a wide range of trade and light industrial applications, including HVAC control panel assembly, electrical enclosure work, and general mechanical assembly requiring a low-profile head with deep slotted engagement. The fillister head provides greater vertical height than a pan head, offering more drive engagement with a standard flat-blade or cabinet screwdriver. It is well suited for tapped metal holes and threaded inserts in sheet metal or machined components.

Key Features

• 4-40 unified coarse thread for compatibility with standard 4-40 tapped holes and inserts
• Fillister head profile provides increased driver engagement depth compared to flat or pan head styles
• Slotted drive accepts standard flat-blade screwdrivers and cabinet-tip bits
• Zinc finish over steel provides basic corrosion resistance for indoor use
• Manufactured to ASME B18.6.3 and SAE J82 dimensional and material standards
• Sold in quantities of 100 per package, suitable for shop stock or production use

Compatibility

Designed as a standard inch-series machine screw for use in any application requiring a 4-40 threaded fastener with a fillister head and slotted drive, including tapped metal assemblies, threaded inserts, and pre-drilled component panels.

Installation Notes

Install using a flat-blade or cabinet-tip screwdriver sized to the slot width to avoid cam-out or slot damage. Verify that the mating tapped hole or threaded insert is clean and properly formed to 4-40 specifications before driving. Avoid over-torquing into thin sheet metal or plastic bosses, as the 4-40 thread form is susceptible to stripping under excess load. De-energize any electrical assembly before fastening components inside live panels, in accordance with applicable NFPA 70 lockout/tagout procedures.