Close-up of 1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated showing flat head and zinc finish

Vendor:FMW Fasteners

1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated

$108.51

1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated from FMW Fasteners features a flat head with thread cutting machine screw thread and a blunt tapered point. Designed with multi-cutting edges and chip cavities, it suits heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass, and plastic.

  • Flat head with Phillips drive
  • 4-inch length with 1/4-20 thread size
  • Zinc plated for corrosion consideration
  • Thread cutting with multi-cutting edges and chip cavities
  • Suitable for heavy gauge sheet metal and various casting materials

Hardware fastener

Choose the exact fastener for your project

Screw specifics

Precise Specifications

Brand or supplier
FMW Fasteners
Product type
Home and maker product

What arrives

One 1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated in the selected option unless the product page clearly lists a set or kit. Props and styling accessories shown in photos are not included.

Thread and fit

Exact Match Required

Confirm the exact size, thread, washer/bolt/nut type, and material before using 1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated. Install with the correct tool and torque guidance for the assembly.

Ensure thread size, length, and head style align with your assembly needs.

Compatible only with matching thread sizes, holes, washers, nuts, bolts, and materials. Do not substitute fasteners where strength, safety, or corrosion resistance is critical without checking the spec.

Always follow the manufacturer's care, use, and safety guidance.

Order and delivery info

Shipping and Returns

Shipping details

Shipping rates and estimated delivery times are shown at checkout.

Returns policy

Return requests are accepted within 30 days of delivery. Contact Resin Society first for damaged, defective, incorrect, or missing items and we will coordinate directly with FMW Fasteners.
Close-up of 1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated showing flat head and zinc finish

Quiet strength, hidden in plain sight

A flat head that settles flush, threads that bite cleanly—the small decision that makes the whole piece feel finished.

At the workbench

The turn that holds it together

Purpose in every thread

Projects stall when fasteners strip, sit proud, or fight alignment. The 1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated cuts its own path into heavy gauge sheet metal and cast materials, then disappears level with the surface. The blunt tapered point and multi-cutting edges help start true and clear chips as you drive. It’s the small part that keeps the line clean and the structure steady.

Flush, firm, finished

When a head sits flush, panels meet without protest and edges read as one plane. In steel shops, garages, and studios, this single choice keeps doors closing square and fixtures feeling intentional. Zinc’s cool sheen resists the scuffs of handling while you assemble, and the thread form makes confident work through aluminum, cast iron, brass, zinc and lead die castings, and plastic.

For those who measure twice

Makers and builders who value a clean, countersunk finish and a reliable cut in heavy gauge sheet and cast materials.

Put it to work

Drive it into a properly sized pilot to fasten countersunk fittings or panels so the head sits level with the surface.
  • Shop builds
  • Woodworking hardware
  • Fabrication
  • Repairs
  • Corrosion-conscious assemblies
FMW Fasteners brand cover

About FMW Fasteners

Reliable hardware for precise builds

FMW Fasteners supplies machine screws, fasteners, and hardware details where sizing and compatibility matter. The brand specializes in practical, fit-first components chosen for how they look, work, and live in a space or studio. Each item is presented with the dimensions, materials, variants, care, and delivery details that builders, shops, and project customers rely on to finish work precisely and confidently. Buyers who value dependable compatibility and clear specifications will find these details make installation and maintenance straightforward — especially for builders, shops, and project customers working with tools and materials. They remove guesswork from small-but-essential choices.
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Your order gives back

When you buy from Resin Society, you help plant trees through our reforestation partnership. It is a small way your order supports the materials, homes, and landscapes makers care about.

Common Questions

FAQs about 1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated

What size and length is this screw?
It’s a 1/4-20 machine screw that is 4 inches long with a Phillips flat head.
What materials is it intended to cut into?
It’s a Type F thread-cutting screw for heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass, and plastic.
Will the head sit flush with the surface?
Yes. The flat head is designed to countersink so it can sit level with a matching recess.
What driver does the head accept?
It has a Phillips drive.
What finish does it have?
It is zinc plated.