Mutual Screw & Supply

5/16-18 X 3" Machine Screws | Flat Head Phillips Drive | Steel Zinc Plated (200 / Pkg.)

5/16-18 X 3" Machine Screws | Flat Head Phillips Drive | Steel Zinc Plated (200 - Main image
$14.26 $19.8 In stock

These 5/16-18 x 3" machine screws are manufactured from Steel with a zinc plated finish, featuring a phillips drive and a flat head. They are well suited to fastening metal parts, panels, and enclosures.

  • Material and finish: Steel, Zinc Plated finish
  • Drive: Phillips
  • Head style: Flat
  • Thread size: 5/16-18
  • Length: 3"
  • Applications: Fastening metal parts, panels, and enclosures

Specifications

  • Product type: Machine Screws
  • Material: Steel
  • Finish: Zinc Plated
  • Head style: Flat
  • Drive type: Phillips
  • Thread size: 5/16-18
  • Length: 3"
  • Threads per inch: 18
  • Measurement type: Imperial
  • Pack quantity: 50 per package

Please note: This item is excess stock and is sold non-cancelable, non-refundable, and non-returnable. Please call us with any questions about this item before ordering.

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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 (4.8 / 5 · 5 reviews)

Eva ★★★★★

The flat head design sits flush in my steel project, and the Phillips drive didn't cam out once despite my impact driver. For three inches long, these screws bite cleanly into the pre-drilled holes and hold tight.

Carter B. ★★★★★

The zinc plating on these 5/16-18 machine screws is smooth and consistent, so they slid right into pre-drilled holes without any binding. I used them to fasten a metal panel to an enclosure, and the flat head sits flush just as needed. For a 200-pack, the quality feels better than what I usually fin

Owen W. ★★★★★

The zinc coating on these screws is nice and even, giving them a clean look for attaching metal brackets on my workbench. They threaded smoothly into tapped holes without any binding, and the full 3-inch length was just right.