Value Collection 580647PR Flat Head Machine Screw 1/4-20

Product Description

The VALUE COLLECTION 580647PR is a flat head slotted machine screw designed for general-purpose fastening in metal, wood, and composite assemblies. It features a 1/4-20 UNC thread and measures 1-1/2 inches in overall length. The flat head profile sits flush with or below the surface of the mating material, making it a standard choice when a low-profile fastener is required. Manufactured from Grade 2 steel with a zinc finish for basic corrosion resistance, this screw suits a wide range of light- to medium-duty mechanical and structural applications. Installation requires a standard slotted flathead screwdriver or bit.

This screw is used in residential and light commercial maintenance, equipment assembly, panel mounting, and general fabrication work. The 1/4-20 UNC thread is one of the most common inch-series thread sizes, making this fastener compatible with a broad range of tapped holes, threaded inserts, and standard hex nuts. It is appropriate for HVAC panel assembly, electrical enclosure work, plumbing fixture mounting, and similar trade-service tasks where a flush-seated fastener is needed.

Key Features

• 1/4-20 UNC thread for broad compatibility with standard tapped holes and hardware
• 1-1/2 inch overall length with full thread engagement along the shank
• Flat head profile seats flush with the work surface
• Slotted drive accepts standard flathead screwdrivers and bits
• Grade 2 steel construction with zinc finish for light corrosion resistance
• No washer — installs directly against the mating surface

Compatibility

Designed as a standard inch-series UNC machine screw suitable for use with any 1/4-20 tapped hole, threaded insert, or matching nut in general mechanical and trade assembly applications.

Installation Notes

Installation is performed using a standard slotted flathead screwdriver or power driver bit sized for the slot. De-energize or shut down any equipment before fastening into electrical enclosures or powered assemblies. Do not overtighten Grade 2 steel fasteners into soft materials such as aluminum or plastic, as thread stripping can occur. Follow applicable mechanical and electrical codes for fastener requirements in specific assemblies.