Mutual Screw & Supply

5/16-18 X 2-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (100 / Pkg.)

5/16-18 X 2-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$31.09 $44.41 In stock

5/16-18 x 2-1/4" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 5 Steel Yellow Zinc construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 100

Specifications

  • Thread Size: 5/16-18
  • Length: 2-1/4"
  • Threads Per Inch: 18
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 100
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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 (5.0 / 5 · 5 reviews)

Christopher ★★★★★

The hex heads grabbed my socket wrench cleanly on the first try, and the yellow zinc finish looks tough enough for shop grime. I needed the partial threads to clamp two plates tight without bottoming out, and they did exactly that.

Sebastian A. ★★★★★

The partially threaded shank on these grade 5 bolts made alignment much easier when I was assembling a heavy-duty jig, and the yellow zinc finish seems tough enough to resist a few drops of oil. Exactly what I needed for the price.

Stella H. ★★★★★

I needed bolts that wouldn't strip easily under heavy torque, and the hex heads on these grip a socket perfectly every time. The yellow zinc coating looks clean and should resist rust well in my shop.