Value Collection R83924422 4-40 X 3/8 in Round Head Slotted Screw

Product Description

The VALUE COLLECTION R83924422 is a 4-40 UNC machine screw designed for precision fastening in light-duty mechanical assemblies. It features a round head profile with a slotted drive and measures 3/8 inches in length under the head. Manufactured from grade 18-8 stainless steel with a bright uncoated finish, this screw resists corrosion and maintains strength in both indoor and outdoor environments. The 4-40 thread designation indicates a Number 4 diameter with 40 threads per inch, making it suitable for fine-tolerance applications in electronics, instrumentation, and light structural work. Licensed tradespeople and assembly technicians install these in production runs or repair work where corrosion resistance and consistent thread engagement matter.

This screw is used in residential and commercial applications wherever a small-diameter, corrosion-resistant fastener is required. Typical install scenarios include electrical enclosures, instrument panels, HVAC controls, terminal boards, and light sheet metal assemblies. The slotted drive accommodates standard flat-blade screwdrivers, which are common in panel and control-board service work. This screw ships in a minimum order quantity of 100 pieces per package, making it practical for production assembly, service kits, and bulk shop stock.

Key Features

• 4-40 UNC thread form for fine-pitch engagement in light-duty assemblies
• 3/8 inch length under head for moderate depth fastening
• Round head profile distributes clamping load across a wider surface area
• Slotted drive compatible with standard flat-blade screwdrivers
• Grade 18-8 stainless steel construction resists rust and corrosion
• Bright uncoated finish with no additional plating or treatment

Compatibility

Designed as a standard 4-40 UNC machine screw for use in any application requiring a Number 4 diameter, 40 threads-per-inch, round head, slotted fastener in stainless steel. No washer included.

Installation Notes

Install using a flat-blade screwdriver sized to fit the slotted head without slipping, which can damage the drive recess or surrounding material. De-energize any electrical enclosure or control board before installing or removing fasteners. Apply consistent torque by hand to avoid stripping the 4-40 thread in soft base materials such as aluminum or plastic. Follow applicable assembly or equipment service documentation for torque guidance specific to the host product.