Value Collection 0402MSB 4-40 Binding Head Slotted Machine Screw

Product Description

The VALUE COLLECTION 0402MSB is a 4-40 unified coarse thread machine screw with a binding head and slotted drive. Built from steel with a zinc finish, it measures 0.125 inches in length under the head and conforms to ASME B18.6.3 and SAE J82 dimensional and material standards. The binding head profile seats flush against the work surface and resists loosening under vibration, making it well suited for light-duty fastening in electrical enclosures, panel assemblies, and instrument housings. This fastener is installed by electricians, panel builders, and mechanical assemblers working on precision assemblies where small-diameter threaded fasteners are required.

This screw is commonly used in residential and commercial applications where 4-40 threaded inserts or clearance holes are present. Typical install scenarios include securing terminal blocks, mounting small components inside electrical enclosures, and assembling instrument panels. The slotted drive accepts a standard flat-blade screwdriver, making it accessible with basic hand tools in tight quarters. Sold individually per package with a minimum order quantity of 100 pieces.

Key Features

• 4-40 unified coarse thread for broad compatibility with standard 4-40 tapped holes and inserts
• Binding head profile provides a low-profile, high-seating-force head without a separate washer
• Slotted drive accepts standard flat-blade screwdrivers and is compatible with automated assembly tooling
• Steel construction with zinc finish provides corrosion resistance in dry indoor environments
• Conforms to ASME B18.6.3 and SAE J82 for dimensional accuracy and material grade compliance
• No washer required — washer style is without washer per specification

Compatibility

Designed as a standard 4-40 UNC machine screw suitable for any application requiring a binding head slotted fastener conforming to ASME B18.6.3 and SAE J82 specifications.

Installation Notes

Install using a flat-blade screwdriver sized to the slotted head to avoid cam-out and head damage. De-energize and lock out any electrical assembly before inserting or removing fasteners inside live enclosures in accordance with applicable NFPA 70 and OSHA lockout/tagout requirements. Do not overtighten — small-diameter machine screws are susceptible to thread stripping in soft materials such as aluminum or plastic. Inspect threads on both the screw and the tapped hole before assembly.