Value Collection 0406MSR 4-40 X 3/8 in Round Head Slotted Screw

Product Description

The VALUE COLLECTION 0406MSR is a 4-40 x 3/8 inch round head slotted machine screw manufactured from steel with a zinc-plated finish. Sold in a minimum order quantity of 100 pieces, this fastener is suited for light-duty mechanical assembly, electrical enclosures, and general fabrication work where a standard inch-series thread is specified. The zinc plating provides basic corrosion resistance for indoor or sheltered applications. Compliance with ASME B18.6.3 and SAE J82 ensures dimensional consistency across production runs.

This screw is used in residential and commercial applications wherever a 4-40 inch-series threaded fastener is required. Typical installation scenarios include mounting small components inside electrical panels, control boards, HVAC equipment covers, and light sheet-metal assemblies. The round head profile provides a low-profile bearing surface without requiring a countersunk hole, and the slotted drive is compatible with standard flat-blade screwdrivers.

Key Features

• 4-40 thread size, inch-series, for standard light-duty mechanical assembly
• 3/8 inch length measured under head per ASME B18.6.3
• Round head profile — no countersink required
• Slotted drive accepts standard flat-blade screwdrivers
• Steel construction with zinc-plated finish for basic corrosion resistance
• Meets ASME B18.6.3 and SAE J82 dimensional standards

Compatibility

Designed as a standard inch-series 4-40 threaded machine screw suitable for use in any application requiring an ASME B18.6.3 compliant round head slotted fastener without a washer face.

Installation Notes

Install using a flat-blade screwdriver sized to the slot width to avoid cam-out and head damage. Always verify that mating threads are clean and correctly tapped to 4-40 before driving. Do not overtighten — Grade J82 steel screws at this size have limited torque capacity. Follow applicable assembly or equipment manufacturer torque guidance where specified.