Mutual Screw & Supply

5/8-18 X 3-1/2" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

5/8-18 X 3-1/2" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$49.18 $75.66 In stock

5/8-18 x 3-1/2" 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 25

Specifications

  • Thread Size: 5/8-18
  • Length: 3-1/2"
  • Threads Per Inch: 18
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 25
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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 (4.6 / 5 · 5 reviews)

Thomas ★★★★★

The threads on these caught clean right out of the bag, and the yellow zinc finish looks tough enough for outdoor gear. I used a socket on the hex head and they seated firmly into the frame with zero stripping.

Claire A. ★★★★★

Grade 5 steel feels plenty sturdy for the equipment frame I bolted together, and the hex heads grabbed my socket wrench without any stripping. The partial threading made alignment easier than I expected on a blind hole.

Edward I. ★★★★★

Installed these on a heavy-duty trailer hitch I built, and the partially threaded design made alignment much easier than fully threaded bolts. The yellow zinc coating looks like it'll hold up well to road salt and weather.