Mutual Screw & Supply

1/4-28 X 3-1/4" Hex Head Cap Screws | Grade 8 Steel Zinc Plated | Partially Threaded (600 / Pkg.)

1/4-28 X 3-1/4" Hex Head Cap Screws | Grade 8 Steel Zinc Plated | Partially - Main image
$39.4 $57.94 In stock

1/4-28 x 3-1/4" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 8 Steel Zinc Plated construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 600

Specifications

  • Thread Size: 1/4-28
  • Length: 3-1/4"
  • Threads Per Inch: 28
  • Material: Steel
  • Grade: Grade 8
  • Finish: Zinc Plated CR+3
  • Thread Style: Partially Threaded
  • Pack Quantity: 600
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When it ships

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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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Delivery costs

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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 (4.8 / 5 · 5 reviews)

John J. ★★★★★

Threading was consistent across all 600 pieces, which saved me a ton of time on assembly. The zinc plating looks good and should resist rust in the shop environment.

Scarlett O. ★★★★★

Needed a bulk order for a project and these 1/4-28 hex heads came in at the right length. The threads are clean and the grade 8 steel feels solid, no stripped heads so far. A solid deal for the quantity.

Mia S. ★★★★★

Used these to replace the cheap bolts on a milling fixture and the grade 8 steel holds torque way better than the originals. The zinc plating looks consistent and no rust after a few weeks in the shop.