Mutual Screw & Supply

9/16-18 X 3" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

9/16-18 X 3" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc - Main image
$127.96 $180.22 In stock

9/16-18 x 3" 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: 9/16-18
  • Length: 3"
  • 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 (5.0 / 5 · 5 reviews)

Henry V. ★★★★★

Had an old piece of farm equipment where the original bolts were rusted solid, and these L9 alloy screws with the yellow zinc coating are holding up way better than I expected. The partial threading makes alignment a lot easier when you're wrestling a heavy bracket into place.

Penelope ★★★★★

The hex heads on these cap screws fit my socket perfectly without any wobble, and the yellow zinc finish has a nice, consistent sheen. Used them to secure a heavy-duty guard on an old press, and they threaded smoothly the whole way.

Richard ★★★★★

The partially threaded design made these bolts perfect for securing a heavy bracket where only the top needed full grip. The Grade L9 steel feels noticeably tougher than the standard hardware store stuff I usually grab.