Value Collection R83924146 4-40 X 1.25in Round Slotted Screw

Product Description

The VALUE COLLECTION R83924146 is a 4-40 UNC machine screw with a round head and slotted drive, manufactured from 18-8 stainless steel with a bright, uncoated finish. It measures 1.25 inches in length under the head and is supplied without a washer. The 18-8 stainless alloy provides solid corrosion resistance in general-purpose fastening applications. This screw is a standard inch-series fastener used across mechanical assembly, electronics, HVAC equipment panels, and light industrial hardware. Installation is performed by technicians and assemblers working with standard slotted or flat-blade drivers.

This fastener suits residential and commercial applications where a small-diameter, corrosion-resistant machine screw is required. Common uses include securing panels, brackets, and components in HVAC units, electrical enclosures, and general equipment assemblies. The 4-40 thread size is one of the most widely used fine-pitch machine screw standards in North American trade and light manufacturing environments. Minimum order quantity is 100 pieces per order.

Key Features

• 4-40 UNC thread form for broad compatibility with standard 4-40 tapped holes and nuts
• Round head profile provides a low, domed bearing surface suitable for through-hole and countersunk panel applications
• Slotted drive accepts standard flat-blade screwdrivers
• 18-8 stainless steel construction offers corrosion resistance without additional coating
• Bright, uncoated finish — no surface treatment to chip, flake, or interfere with electrical grounding paths
• Length measured under head at 1.25 inches, no washer included

Compatibility

Designed as a standard 4-40 UNC inch-series machine screw suitable for any application requiring a round-head slotted fastener in that thread size and length.

Installation Notes

Install with a flat-blade screwdriver sized to the slotted head to avoid cam-out and head damage. Use a properly sized 4-40 tap or pre-tapped hole; cross-threading stainless fasteners can cause galling, which is difficult to reverse. Torque to the assembly specification for the application — do not over-torque, as 18-8 stainless is prone to galling under excessive rotational load. De-energize and lock out any electrical equipment before fastening components inside live enclosures.