Mutual Screw & Supply

5/16-18 X 5-1/2" Machine Screws | Flat Head Phillips Drive | Steel Zinc Plated (100 / Pkg.)

5/16-18 X 5-1/2" Machine Screws | Flat Head Phillips Drive | Steel Zinc Plated - Main image
$41.64 $57.83 In stock

Zinc-plated steel machine screw for general-purpose fastening. The zinc coating adds corrosion resistance for indoor and light outdoor use.

Specs

  • Dimensions: 5/16-18 5-1/2"
  • Drive type: Phillips
  • Head style: Flat Head
  • Material: Steel Zinc Plated
  • Thread: 5/16-18 UNC (coarse)

Features

  • Machine-thread screws for use with nuts or tapped holes
  • Flat head profile
  • Phillips drive
  • Steel Zinc Plated 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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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)

Eli V. ★★★★★

These were exactly the right length to secure some heavy shelf brackets in my garage. The Phillips heads bit cleanly without any cam-out, and the zinc coating seems decently thick.

Daniel ★★★★★

Used a full pack mounting a pergola bracket to a beam, and every single one seated cleanly without stripping. The zinc finish has held up through a few rainstorms already, so the corrosion resistance is doing its job.

Benjamin ★★★★★

These are longer than I expected for the size, and the flat heads sit perfectly flush in my jig. The zinc coating is a nice touch, they’ve held up well in my damp garage without any rust so far.