Mutual Screw & Supply

5/16-24 X 1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Fully Threaded (100 / Pkg.)

5/16-24 X 1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow - Main image
$46.88 $62.51 In stock

5/16-24 x 1/2" 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: 1/2"
  • 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 (4.4 / 5 · 5 reviews)

Leo ★★★★★

Put these on a stubborn farm implement bracket where lesser bolts kept snapping. The Grade L9 alloy steel threads engaged smoothly and the hex head grabbed firmly with a standard wrench. Overkill for most home projects, but exactly what I needed for this repair.

Ryan M. ★★★★★

Needed a few for a heavy-duty jig assembly and the Grade L9 alloy steel held up perfectly under torque. The yellow zinc finish looks good too, no chips after tightening with a socket.

Natalie V. ★★★★★

I was a little worried the L9 alloy steel would be too brittle for my heavy equipment repairs, but these hex cap screws torqued down smoothly without any snapping. The yellow zinc coating gives them a nice look and seems to hold up well against corrosion in damp shop conditions.