Mutual Screw & Supply

5/16-24 X 1" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Fully Threaded (100 / Pkg.)

5/16-24 X 1" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc - Main image
$48.82 $78.74 In stock

5/16-24 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: 5/16-24
  • Length: 1"
  • Threads Per Inch: 24
  • Material: Alloy Steel
  • Grade: Grade L9
  • Finish: Yellow Zinc CR+3
  • Thread Style: Fully Threaded
  • Pack Quantity: 100
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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)

Owen O. ★★★★★

The hex head on these bolts fit my socket wrench perfectly, and the yellow zinc finish looks clean and durable. Threaded all the way, so they grabbed evenly in my equipment mount without any binding. Exactly what I needed for a solid, no-nonsense repair job.

Amelia X. ★★★★★

I needed a strong bolt for a heavy equipment repair, and these fully threaded Grade L9s drove in perfectly with a socket wrench. The hex heads held up to torque without stripping, and the yellow zinc gave them a clean, consistent look. Exactly what I was hoping for from a US-made fastener.

Edward K. ★★★★★

The yellow zinc finish on these Grade L9 bolts held up perfectly during assembly—no flaking or galling on the threads. I've used cheaper packs before, but the fully threaded length and consistent hex sizing made torquing them down a breeze.