Value Collection MSRI0-400750-100BX Machine Screw 4-40

Product Description

The VALUE COLLECTION MSRI0-400750-100BX is a 4-40 UNC machine screw with a round head and slotted drive, supplied in a box of 100. The screw measures 3/4 inches in length, measured under the head. It is manufactured from alloy steel and finished with a zinc plating for basic corrosion resistance in dry indoor environments. These fasteners are used across light assembly, panel mounting, and component attachment tasks common in electrical, HVAC, and general mechanical work. They ship without a washer and conform to inch-standard (UNC) threading.

These screws are suited for light-duty fastening applications where a 4-40 thread is specified. Typical uses include securing terminal blocks, control board mounting brackets, small electrical enclosure components, and instrument panels. The slotted round head provides a low-profile bearing surface and is compatible with standard flathead screwdrivers. The zinc plating is appropriate for indoor or protected installations where moderate handling resistance is required. The 100-count box format supports bench stock replenishment and service truck inventory.

Key Features

• 4-40 UNC thread for compatibility with standard inch-series tapped holes
• 3/4 inch length under head for consistent grip in typical panel and bracket applications
• Round head profile with slotted drive for use with standard flathead screwdrivers
• Alloy steel construction provides strength suitable for light mechanical fastening
• Zinc plating offers basic corrosion resistance in dry indoor environments
• Supplied without washer — no washer removal or substitution required at install

Compatibility

Designed as a standard inch-series machine screw for any application requiring a 4-40 UNC thread, round head, and slotted drive in alloy steel with zinc finish.

Installation Notes

Install using a standard flathead screwdriver sized to the slotted head. Power down or de-energize any equipment before fastening components inside electrical enclosures or control panels, in accordance with applicable NFPA 70 (NEC) lockout/tagout procedures. Do not overtighten — alloy steel screws at this thread size have limited torque tolerance in softer tapped materials such as aluminum or plastic. Verify thread engagement depth matches the tapped hole to prevent stripping.