Mutual Screw & Supply

5/16-18 X 1" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Fully Threaded (100 / Pkg.)

5/16-18 X 1" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc - Main image
$53.22 $71.92 In stock

5/16-18 x 1" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade L9 Alloy Steel Yellow Zinc construction
  • Fully Threaded
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 100

Specifications

  • Thread Size: 5/16-18
  • Length: 1"
  • Threads Per Inch: 18
  • Material: Alloy Steel
  • Grade: Grade L9
  • Finish: Yellow Zinc CR+3
  • Thread Style: Fully Threaded
  • Pack Quantity: 100
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When it ships

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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 (4.8 / 5 · 5 reviews)

Charlotte Y. ★★★★★

I needed some heavy-duty fasteners for a loader attachment repair, and these L9 alloy steel bolts held up perfectly under the torque. The hex heads grabbed cleanly with a socket, and the yellow zinc finish looks like it’ll resist rust well.

Daniel X. ★★★★★

These threaded perfectly into the existing equipment mounts on my trailer, and the yellow zinc finish looks clean and corrosion-resistant right out of the package. They’re definitely tougher than the standard hardware I was using before.

Ella ★★★★★

I’ve been putting these bolts through their paces on a heavy-duty trailer hitch project, and they haven’t budged. The yellow zinc finish is holding up nicely against the shop grime and the threads are sharp, making installation a snap.