Value Collection MPRI02504000-100BX Machine Screw 1/4-20x4

Product Description

The VALUE COLLECTION MPRI02504000-100BX is a 1/4-20 x 4 inch round head Phillips machine screw designed for general mechanical assembly and fastening applications. Manufactured from Grade 2 steel with a zinc plating finish, this screw offers basic corrosion resistance suitable for indoor and light-duty use. The round head profile provides a low-profile, finished appearance on exposed surfaces, while the Phillips drive allows for fast installation with standard Phillips screwdrivers or power drivers. Length is measured under the head at 4 inches, and the Unified National Coarse (UNC) thread form ensures broad compatibility with standard tapped holes and threaded inserts. Sold in a box of 100.

This screw is commonly used in light fabrication, equipment assembly, HVAC panel work, electrical enclosures, and general mechanical maintenance. The 1/4-20 UNC thread is one of the most widely used coarse-thread fastener sizes in North American trade applications, making this screw a standard stock item for service vans and shop bins alike. The zinc coating helps resist surface oxidation in dry to mildly humid environments. These screws are suitable for any trade professional who needs reliable, off-the-shelf inch-series fasteners in volume.

Key Features

• 1/4-20 UNC coarse thread for broad compatibility with standard tapped holes and threaded inserts
• 4-inch length under head for deep fastening reach in thicker assemblies
• Round head Phillips drive for fast installation with common screwdrivers or bit drivers
• Grade 2 steel construction provides adequate strength for general-purpose fastening
• Zinc plating finish offers basic corrosion resistance for dry and mildly humid environments
• Sold in a 100-count box for shop stocking or volume service work

Compatibility

Designed for use with standard 1/4-20 UNC tapped holes and threaded fastener hardware in inch-measurement assemblies across HVAC, electrical, plumbing, and general mechanical applications.

Installation Notes

Install with a No. 2 Phillips screwdriver or matching bit driver. Ensure the mating hole is cleanly tapped to 1/4-20 UNC before driving to avoid thread damage. Do not overtorque; Grade 2 fasteners have lower proof load ratings than Grade 5 or Grade 8 hardware. Power down or de-energize any equipment before fastening near electrical components.