Mutual Screw & Supply

1/4-20 X 3-1/2" Machine Screws | Round Head Slotted Drive | Steel Zinc Plated (300 / Pkg.)

1/4-20 X 3-1/2" Machine Screws | Round Head Slotted Drive | Steel Zinc Plated - Main image
$14.33 $19.11 In stock

These 1/4-20 x 3-1/2" 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: 1/4-20
  • Length: 3-1/2"
  • 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: 1/4-20
  • Length: 3-1/2"
  • Threads per inch: 20
  • Measurement type: Imperial
  • Pack quantity: 100 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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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 (4.6 / 5 · 5 reviews)

William ★★★★★

Zinc plating is holding up nicely so far—no rust after a week of outdoor use, and the round heads seat flush without stripping. These 3-1/2" lengths are perfect for my metal panel enclosures, and 300 in one box means I won’t be reordering any time soon.

Madison ★★★★★

I was pleasantly surprised by how smooth the threads are on these 1/4-20 bolts—they started by hand without any binding. Used them to mount some heavy steel brackets and the zinc plating held up well against my wrench.

Violet ★★★★★

Exactly the right length for bolting together steel enclosure frames — the zinc coating looks evenly applied and the slotted heads seat nicely with a standard screwdriver. Used about half the box on a weekend project and not a single stripped thread or dud in the bunch.