Value Collection 580631PR Flat Head Machine Screw 1/4-20

Product Description

The VALUE COLLECTION 580631PR is a 1/4-20 x 1 inch flat head slotted machine screw manufactured from Grade 2 steel with a zinc finish. It features a unified national coarse (UNC) thread form and is measured by overall length at 1 inch. The flat head profile sits flush with or below the surface of the fastened material, making it a common choice in panel assemblies, equipment enclosures, and structural brackets across HVAC, electrical, and general mechanical applications. Installation is performed by any trade technician requiring a secure, flush-mount threaded fastener.

This screw is suited for light-duty to medium-duty fastening applications in residential and commercial settings. The zinc coating provides basic corrosion resistance for indoor and mildly exposed environments. The 1/4-20 UNC thread is one of the most widely used coarse-thread sizes in trade work, compatible with standard 1/4-20 tapped holes, nuts, and threaded inserts. It is commonly used in electrical enclosures, HVAC equipment panels, plumbing fixture brackets, and general sheet metal assemblies where a countersunk flush finish is required.

Key Features

• 1/4-20 UNC coarse thread for broad compatibility with standard tapped holes and hardware
• Flat head design seats flush with the workpiece surface for a clean, low-profile finish
• Slotted drive accepts standard flat-blade screwdrivers for installation and removal
• Grade 2 steel construction provides reliable tensile strength for light-duty to medium-duty fastening
• Zinc finish delivers basic corrosion resistance in indoor and sheltered environments
• 1 inch overall length suits standard panel thicknesses and bracket assemblies

Compatibility

Designed as a standard 1/4-20 UNC machine screw for use in any application requiring a flat head slotted fastener with a 1 inch overall length and zinc-finished Grade 2 steel construction.

Installation Notes

Install using a flat-blade screwdriver sized to the slot width to avoid cam-out and fastener damage. Ensure the mating hole is properly tapped or fitted with a compatible 1/4-20 nut or insert before driving the screw. Do not overtighten Grade 2 fasteners in thin sheet metal or soft substrate materials, as the lower tensile rating compared to Grade 5 or Grade 8 hardware makes them susceptible to stripping under excessive torque. Follow applicable mechanical and electrical codes when fastening equipment enclosures or structural components.