Value Collection MSRI0-300870-100BX Machine Screw 100-pack

Product Description

The VALUE COLLECTION MSRI0-300870-100BX is a 3-48 x 7/8-inch round head slotted machine screw manufactured from alloy steel with a zinc-plated finish. It conforms to ASME B18.6.3, the standard governing slotted and recessed head machine screws. The round head profile provides a low-profile bearing surface, and the slotted drive accepts a standard flat-blade screwdriver. Length is measured under the head at 7/8 inches. This fastener is sold in a box of 100 and is installed by electricians, HVAC technicians, plumbers, and general mechanical trades wherever a fine-thread No. 3 machine screw is required in light-duty metal or plastic assemblies.

This screw is suited to residential and commercial applications where a small-diameter, fine-thread fastener is needed to secure panels, junction boxes, equipment covers, small brackets, or light sheet metal components. The zinc plating provides moderate corrosion resistance appropriate for interior and sheltered environments. The 3-48 thread designation indicates a No. 3 diameter with 48 threads per inch, making it a fine-pitch fastener for tight engagement in thin materials or threaded inserts.

Key Features

• 3-48 thread size with 48 threads per inch for secure engagement in thin or close-tolerance materials
• 7/8-inch length measured under the head per ASME B18.6.3
• Round head profile for a clean, low-profile finish on panel and cover installations
• Slotted drive compatible with standard flat-blade screwdrivers
• Alloy steel construction with zinc-plated finish for moderate corrosion resistance
• Sold in a 100-piece box for job-site and shop inventory use

Compatibility

Designed as a general-purpose 3-48 machine screw suitable for threaded holes, nuts, or inserts conforming to the 3-48 UNC/UNF thread standard in metal, plastic, or composite assemblies.

Installation Notes

Installation requires a flat-blade screwdriver or slotted bit sized to the No. 3 head. Verify that the mating thread or nut conforms to the 3-48 thread specification before installation. Do not overtighten small-diameter machine screws into soft materials or thin sheet metal, as the threads can strip. Power down and de-energize any electrical enclosure or equipment before fastening or removing panel screws.