Mutual Screw & Supply

#4-40 X 3/8" Machine Screws | Flat Head Phillips Drive | Brass (600 / Pkg.)

#4-40 X 3/8" Machine Screws | Flat Head Phillips Drive | Brass (600 / Pkg.) - Main image
$35.39 $50.55 In stock

Brass flat head Phillips machine screw for general-purpose, light-duty, and decorative fastening. Brass offers natural corrosion resistance, is non-magnetic and electrically conductive, and gives a clean finished appearance, making it well suited to electrical, plumbing, marine, and trim work.

Specs

  • Dimensions: #4-40 X 3/8"
  • Drive type: Phillips
  • Head style: Flat Head
  • Material: Brass
  • Thread: 4-40 UNC (coarse)

Features

  • Material: Solid brass resists corrosion, will not rust, and is non-magnetic with good electrical conductivity.
  • Drive interface: Phillips recess for fast, self-centering driving by hand or power tool.
  • Head geometry: Flat head provides a flush, countersunk seat in tapped or clearance holes.
  • Thread compatibility: 4-40 UNC coarse thread engages standard tapped holes and nuts.
  • Applications: Electrical fittings, switch and outlet plates, decorative trim, marine and plumbing hardware, and general light-duty assembly.
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Julian S. ★★★★★

The brass finish matched perfectly with my vintage lamp restoration project. These #4-40 screws are consistently threaded and the flat heads sit flush without any wobble. The corrosion resistance is exactly what I needed for a bathroom fixture.

Hazel ★★★★★

I needed these for a small electronics project, and the flat head design sits perfectly flush in the panel. The 600-count package feels like a lifetime supply for any hobbyist.

Olivia ★★★★★

The brass has a nice warm look compared to steel, and the flat heads sit flush perfectly in my decorative project. Pack of 600 was way more than I needed, but the price was right for the quantity.