Value Collection 580679PS 1/4-20 X 3 in Flat Head Slotted Screw

Product Description

The VALUE COLLECTION 580679PS is a 1/4-20 x 3 inch flat head slotted machine screw manufactured from Grade 2 steel with a zinc finish. It features unified national coarse (UNC) threading along the full 3-inch overall length with no washer. The flat head profile sits flush with or below the mating surface, making it a standard choice for countersunk applications. The slotted drive accepts a flat-blade screwdriver. This fastener is used across a broad range of mechanical assembly, maintenance, and equipment installation tasks in HVAC, electrical, plumbing, and general trade work.

This screw is suited for light- to medium-duty fastening applications where a flush or countersunk head is required. Typical installations include panel mounting, equipment enclosures, brackets, and structural assemblies using standard inch-series hardware. The zinc finish provides basic corrosion resistance for indoor and protected outdoor environments. Trade professionals in HVAC, electrical, and mechanical service regularly stock this fastener size for general maintenance and equipment assembly tasks.

Key Features

• 1/4-20 UNC thread for compatibility with standard inch-series tapped holes and nuts
• 3-inch overall length with full-length threading
• Flat head profile allows flush or countersunk seating
• Slotted drive for flat-blade screwdriver installation
• Grade 2 steel construction with zinc finish for basic corrosion protection
• No washer style — clean, direct bearing surface against the mating material

Compatibility

Designed for use in any application requiring a 1/4-20 UNC inch-series machine screw with a flat countersunk head and slotted drive.

Installation Notes

Install using a flat-blade screwdriver sized to the slotted head. A countersunk or chamfered hole is required for the flat head to seat flush. De-energize and lock out any equipment before fastening near electrical or mechanical components per applicable safety codes. Do not overtighten — Grade 2 steel has lower tensile strength than higher-grade fasteners and is not intended for high-stress structural joints.