Value Collection MSFI0-400180-100BX 4-40 Flat Head Slotted Screw

Product Description

The VALUE COLLECTION MSFI0-400180-100BX is a 4-40 UNC machine screw with a flat head and slotted drive, sold in a box quantity of 100. Manufactured from Grade 2 steel with a zinc finish, this screw measures 3/16 inches in overall length. It is a standard inch-system fastener used across a wide range of light-duty mechanical assembly applications. Electricians, HVAC technicians, and general tradespeople reach for this size when securing small panels, terminal covers, enclosure hardware, and instrument mounting brackets.

This 4-40 flat head slotted screw is suited for residential and commercial applications wherever a flush-seating fastener is required in a tapped hole or threaded insert. The flat head countersinks into the workpiece, producing a smooth, low-profile finish. Common install scenarios include control board mounting, junction box cover attachment, and small-gauge sheet metal or plastic panel assembly. The zinc finish provides basic corrosion resistance for indoor and protected environments.

Key Features

• 4-40 UNC thread form for compatibility with standard inch-system tapped holes and inserts
• Flat head profile countersinks flush with the workpiece surface
• Slotted drive works with standard flat-blade screwdrivers
• Grade 2 steel construction for reliable light-duty mechanical hold
• Zinc finish for basic indoor corrosion resistance
• Box quantity of 100 for stocking service vehicles and shop inventory

Compatibility

Designed as a standard 4-40 UNC machine screw for use in any application requiring a flat head slotted fastener in an inch-system tapped hole or threaded insert.

Installation Notes

Install with a flat-blade screwdriver sized to the slotted head to avoid cam-out and fastener damage. Ensure the mating hole is properly tapped to 4-40 UNC before driving. Do not over-torque; Grade 2 steel screws at this diameter are subject to thread stripping if excessive force is applied. For electrical enclosure work, follow applicable NEC requirements for panel and cover hardware.