Value Collection R52001138 Flat Head Phillips Machine Screw

Product Description

The VALUE COLLECTION R52001138 is a 5/16-18 x 2-inch flat head Phillips drive machine screw manufactured from steel with a zinc-plated finish. It conforms to ASME B18.6.3 and SAE J82 standards, making it a dependable choice for general-purpose fastening in mechanical assemblies, equipment enclosures, and structural applications. The flat head profile sits flush with the mating surface when installed into a countersunk hole, providing a clean, low-profile finish. This screw is sold individually but must be ordered in multiples of 10. Installers and maintenance techs working on metal fabrication, HVAC equipment, or industrial machinery will find this a straightforward, standards-compliant fastener.

This machine screw is suited for residential and light commercial applications where a 5/16-18 unified coarse thread is required. Typical uses include mounting panels, brackets, and mechanical components where a flush-mount fastener is preferred. The zinc plating provides moderate corrosion resistance for indoor and light-duty outdoor environments. The 2-inch overall length and 2-inch length under head confirm a flat head geometry with no additional countersink extension needed beyond the head.

Key Features

• 5/16-18 unified coarse thread for broad hardware compatibility
• Flat head profile for flush installation in countersunk holes
• Phillips drive for use with standard Phillips screwdrivers and bits
• Zinc-plated steel construction provides moderate corrosion resistance
• Meets ASME B18.6.3 and SAE J82 dimensional and material standards
• No washer required; supplied without integrated washer

Compatibility

Designed as an OEM-style replacement or stock fastener for applications requiring a 5/16-18 coarse thread flat head machine screw per ASME B18.6.3.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or HVAC service professionals using a Phillips screwdriver or power driver with the appropriate bit. Always ensure the mating hole is properly tapped or threaded to 5/16-18 specification before driving. For flush seating, countersink the receiving material to match the flat head angle. Power down or de-energize any equipment before accessing fastener locations on live electrical or mechanical assemblies.