Value Collection 1524MSF Flat Head Slotted Machine Screw

Product Description

The VALUE COLLECTION 1524MSF is a flat head slotted machine screw designed for general-purpose fastening in metal, wood, and composite assemblies. It features a 1/4-28 unified fine thread and measures 1-1/2 inches in overall length, making it suitable for moderate-depth fastening applications. Constructed from steel with a zinc finish, this screw meets ASME B18.6.3 and SAE J82 standards. The flat head profile sits flush with or below the surface when countersunk, providing a clean finish where protrusion would interfere with mating components. Installed with a standard slotted screwdriver or bit, it is a workhorse fastener used across mechanical, HVAC, plumbing, and electrical trade applications.

This screw is suited for light to medium-duty assembly work in residential and commercial environments. Common applications include panel fastening, equipment enclosures, junction boxes, and general mechanical assembly where a flush surface finish is required. The 1/4-28 fine thread provides better thread engagement and vibration resistance compared to coarse-thread equivalents, making it appropriate for metal-to-metal fastening in moderate-vibration settings. Trade professionals in HVAC, electrical, and plumbing disciplines frequently use this screw type when assembling or servicing equipment enclosures and access panels.

Key Features

• 1/4-28 unified fine thread for strong metal-to-metal thread engagement
• 1-1/2 inches overall length with full-length threading under head
• Flat head profile allows flush or countersunk installation
• Slotted drive compatible with standard flat-blade screwdrivers and bits
• Steel construction with zinc finish for corrosion resistance in typical indoor environments
• Meets ASME B18.6.3 and SAE J82 standards

Compatibility

Designed as a standard 1/4-28 flat head slotted machine screw per ASME B18.6.3, compatible with any tapped or clearance hole application calling for this thread size, head style, and drive type.

Installation Notes

Install using a flat-blade screwdriver or slotted bit sized to the screw head slot. For flush or below-surface installation, ensure the receiving material is properly countersunk to match the flat head angle before driving. Do not overtighten, as steel screws in tapped holes can strip threads or shear if torque is excessive. Always de-energize and isolate equipment before fastening or removing screws on electrical enclosures or live mechanical assemblies.