Mutual Screw & Supply

5/16-18 X 3" Machine Screws | Round Head Slotted Drive | Steel Zinc Plated (180 / Pkg.)

5/16-18 X 3" Machine Screws | Round Head Slotted Drive | Steel Zinc Plated (180 - Main image
$13.66 $19.8 In stock

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

  • Material and finish: Steel, Zinc Plated finish
  • Drive: Slotted
  • Head style: Round
  • 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: Round
  • Drive type: Slotted
  • Thread size: 5/16-18
  • Length: 3"
  • Threads per inch: 18
  • Measurement type: Imperial
  • Pack quantity: 20 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 (4.6 / 5 · 5 reviews)

Michael O. ★★★★★

I needed a full 3-inch thread for a thick bracket and these machine screws delivered—the zinc coating seems solid and should resist rust well. The slotted drive was easy to work with using a standard screwdriver.

Kevin ★★★★★

Exactly the right length for my metal panel project, and the zinc plating gives them a clean, uniform look. The round heads sit flush without sticking out, which saved me from having to countersink anything.

Ruby F. ★★★★★

Zinc plating is holding up well so far, no rust after a few weeks in a slightly damp shop. The slotted drive worked perfectly with my old screwdriver when I needed to adjust a metal bracket on a workbench.