Value Collection R83924309 Machine Screw 1/4-20 Round Head

Product Description

The VALUE COLLECTION R83924309 is a 1/4-20 UNC machine screw with a round head and slotted drive, manufactured from 18-8 stainless steel with a bright uncoated finish. It measures 1-1/4 inches in length under the head and is supplied without a washer. The 18-8 stainless steel construction provides corrosion resistance suitable for general industrial, mechanical, and light structural fastening applications. This fastener is installed by maintenance technicians, millwrights, electricians, and HVAC and plumbing professionals wherever a standard inch-series machine screw is required.

This screw is suited for use in residential and commercial applications where a corrosion-resistant, reusable fastener is needed. Common install scenarios include panel assembly, equipment mounting, enclosure fabrication, and general mechanical assembly. The 1/4-20 UNC thread series is one of the most widely used inch-series thread standards in trade and industrial settings, making this screw a practical stock item for service vans, shops, and job sites.

Key Features

• 18-8 stainless steel construction for corrosion resistance in wet or exposed environments
• 1/4-20 UNC thread for broad compatibility with standard inch-series tapped holes and nuts
• Round head profile provides a low-profile bearing surface without a countersink requirement
• Slotted drive accepts a standard flat-blade screwdriver for installation and removal
• Bright uncoated finish — no plating to flake or interfere with stainless conductivity requirements
• Length under head measured at 1-1/4 inches for predictable grip-length calculations

Compatibility

Designed as a standard 1/4-20 UNC inch-series machine screw for use in any application requiring a round-head slotted fastener in that thread size and length.

Installation Notes

Install with a flat-blade screwdriver sized to the slot width to avoid cam-out and slot damage. Ensure the mating tapped hole or nut is also 1/4-20 UNC before driving. Do not over-torque stainless steel fasteners, as 18-8 stainless is susceptible to galling — apply an anti-seize compound where repeated removal is expected. Follow applicable mechanical codes and equipment manufacturer guidelines for fastener torque requirements.