Mutual Screw & Supply

5/8-18 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

5/8-18 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$43.28 $70.95 In stock

5/8-18 x 3-1/4" 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 25

Specifications

  • Thread Size: 5/8-18
  • Length: 3-1/4"
  • 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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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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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)

Carter W. ★★★★★

Installed these on a heavy press frame where I needed partial threads for the last inch — they seated perfectly with a socket. The yellow zinc coating is a nice touch for light corrosion resistance.

Grace ★★★★★

The yellow zinc coating on these Grade 5 bolts looks uniform and hasn't scratched during my installs, which is more than I can say for cheaper hardware. The partial threading gave me just the grip I needed on a jig without the threads chewing into the wood.

Ava U. ★★★★★

These bolts have a nice, clean yellow zinc finish and the partial threading made it easy to secure a heavy bracket without binding. Used them to mount a motor mount and they torqued down perfectly with a socket. Exactly what I needed for the job.