Value Collection R83924922 Machine Screw 5/16-18

Product Description

The VALUE COLLECTION R83924922 is a 5/16-18 x 2.5-inch round head slotted machine screw manufactured from 18-8 stainless steel with a bright, uncoated finish. The 5/16-18 designation indicates a 5/16-inch nominal diameter with 18 threads per inch, conforming to Unified National Coarse (UNC) thread standards. The round head profile provides a low-profile bearing surface, and the slotted drive is compatible with standard flat-blade screwdrivers. Length is measured under the head at 2.5 inches. This fastener is suited for general mechanical assembly, equipment repair, and structural fastening tasks across trade and industrial applications.

This machine screw is appropriate for residential and commercial applications where corrosion resistance is a priority, such as HVAC equipment panels, electrical enclosures, plumbing fixture assemblies, and pool or outdoor mechanical equipment. The 18-8 stainless steel construction resists rust and oxidation in wet or humid environments. The UNC thread form is the most common inch-series thread standard, making this screw widely interchangeable with standard tapped holes and nuts in that thread class.

Key Features

• 5/16-18 UNC thread form for broad compatibility with standard inch-series tapped holes and nuts
• 18-8 stainless steel construction provides corrosion and oxidation resistance in wet or humid environments
• Round head profile with slotted drive accepts standard flat-blade screwdrivers
• Bright, uncoated finish — no additional plating that could affect dimensional tolerances
• Length under head measured at 2.5 inches for accurate fitment in through-hole and tapped assemblies
• Sold without washer — no captured hardware to manage during installation

Compatibility

Designed as a standard UNC inch-series machine screw compatible with any 5/16-18 tapped hole, nut, or threaded insert requiring a round head slotted fastener in 18-8 stainless steel.

Installation Notes

Install using a flat-blade screwdriver sized to fill the slot fully to avoid cam-out and fastener damage. Always de-energize and lock out electrical equipment before accessing panels or enclosures secured by these screws. Apply thread engagement of at least 1.5 times the nominal screw diameter into tapped holes for adequate holding strength. Do not overtighten stainless steel fasteners in stainless tapped holes without anti-seize compound, as galling can permanently lock the fastener.