Mutual Screw & Supply

9/16-18 X 4" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

9/16-18 X 4" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc - Main image
$155.44 $228.59 In stock

9/16-18 x 4" 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: 4"
  • 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 (4.2 / 5 · 5 reviews)

Eva ★★★★★

Tightened down a heavy-duty jig frame with these yesterday—no stripped threads or flex whatsoever. The yellow zinc coating handled my greasy shop floor well. Exactly what I needed for a serious assembly job.

Samuel ★★★★★

I needed a set of tough bolts for a heavy equipment repair, and these L9 alloy steel screws fit the bill perfectly. The hex head gripped my socket wrench without any slippage, and the partial threading made installation a breeze.

Henry K. ★★★★★

The yellow zinc finish on these L9 bolts is a nice touch, making them look as tough as they feel. I used them to rebuild a press at work and they threaded in smoothly without any binding.