Mutual Screw & Supply

5/8-18 X 8" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

5/8-18 X 8" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | - Main image
$468.19 $641.35 In stock

5/8-18 x 8" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade L9 Alloy Steel Yellow Zinc construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 25

Specifications

  • Thread Size: 5/8-18
  • Length: 8"
  • Threads Per Inch: 18
  • Material: Alloy Steel
  • Grade: Grade L9
  • Finish: Yellow Zinc CR+3
  • 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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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)

Emily ★★★★★

These bolts are rock solid and the yellow zinc coating looks great. The partial threading made them perfect for a project where I needed a smooth shank section. Really glad they're USA made.

Alexander ★★★★★

I needed a longer bolt for a heavy jig I’m building, and these 8-inch hex heads fit the bill nicely. The L9 alloy steel feels sturdy and the partial threading made alignment much easier. Really solid fasteners for the price.

Riley Q. ★★★★★

The yellow zinc finish on these bolts resisted my wrench nicely without any galling during installation. Threads were clean and started easily by hand on my press frame. Exactly the grade L9 strength I needed for this equipment repair.