Mutual Screw & Supply

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

5/16-18 X 5-1/2" Machine Screws | Flat Head Slotted Drive | Steel Zinc Plated - Main image
$57.3 $90.95 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: Slotted
  • 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
  • Slotted drive
  • Steel Zinc Plated construction
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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 (4.6 / 5 · 5 reviews)

Victoria ★★★★★

The slotted head was easy to drive with a standard flathead screwdriver, and the zinc coating looks like it’ll hold up fine in my garage workbench project. These 5-1/2" screws were just the right length for securing thick brackets without needing extra washers.

Harper V. ★★★★★

Installed these in a wooden gate hinge today—the 5-1/2" length grabbed deep into the frame and the zinc coating should keep them from rusting in the light rain.

James E. ★★★★★

The slotted head on these 5/16-18 screws made them a breeze to drive with a standard flathead bit. For this length, the zinc coating on the shaft seems solid enough to handle a few damp days in my shed project.