Mutual Screw & Supply

#4-40 X 3/8" Machine Screws | Round Head Slotted Drive | Brass (800 / Pkg.)

#4-40 X 3/8" Machine Screws | Round Head Slotted Drive | Brass (800 / Pkg.) - Main image
$31.36 $46.8 In stock

Brass machine screw for general-purpose, light-duty, and decorative fastening. Naturally corrosion resistant, non-magnetic, and electrically conductive.

Specs

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

Features

  • Machine-thread screws for use with nuts or tapped holes
  • Round head profile
  • Slotted drive
  • Brass construction
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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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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Madison ★★★★★

The slotted heads on these #4-40 screws are cut clean and deep, so my flathead driver doesn't cam out. Perfect for mounting a small brass nameplate—the 3/8" length was just enough to bite into the wood underneath.

Harper T. ★★★★★

800 brass screws in one pack is hard to beat for the price, and they've held up nicely on some decorative trim I've been working on. The slotted heads seat well with a standard driver, and the non-magnetic property is a nice bonus for small electronics projects. Definitely my go-to for light fasteni

Claire ★★★★★

The slotted drive on these #4-40 screws gives a nice, secure grip with my flathead driver, and the brass has a warm, elegant look that makes the small project feel premium. I used them for a decorative hinge repair and they seated perfectly without stripping—definitely a step up from generic steel h