Mutual Screw & Supply

5/16-18 X 3-3/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (50 / Pkg.)

5/16-18 X 3-3/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$24.61 $35.67 In stock

5/16-18 x 3-3/4" 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 50

Specifications

  • Thread Size: 5/16-18
  • Length: 3-3/4"
  • Threads Per Inch: 18
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 50
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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 (4.4 / 5 · 5 reviews)

Joshua H. ★★★★★

These 5/16-18 cap screws are solid, perfect for securing some heavy machinery guards I was working on. The hex heads grab the socket without slipping, and the yellow zinc finish has a nice, consistent look. Really happy with the 50-count pack for the price.

Joseph ★★★★★

Installed these on a trailer hitch build and the partial thread gave just the right amount of grip without bottoming out. The yellow zinc finish looks clean and hasn't shown any rust after a week of rain.

David ★★★★★

These hex bolts were exactly what I needed for a trailer hitch repair, and the grade 5 steel feels plenty sturdy for the job. The yellow zinc coating gives them a nice finished look and the partial threading made installation a breeze.