Mutual Screw & Supply

3/8-16 X 1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Fully Threaded (100 / Pkg.)

3/8-16 X 1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc - Main image
$45.68 $70.27 In stock

3/8-16 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: 3/8-16
  • Length: 1/2"
  • Threads Per Inch: 16
  • 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 (4.6 / 5 · 5 reviews)

William ★★★★★

Installed these on a custom equipment mount and the threads engaged perfectly with no galling. The yellow zinc finish looks consistent across all 100 pieces, which is nice when you want a uniform appearance.

Daniel L. ★★★★★

Needed a few of these for a heavy-duty jig I’m building, and the Grade L9 alloy steel feels way more solid than the regular bolts from the hardware store. The hex head grips my socket perfectly without slipping.

Christopher P. ★★★★★

The yellow zinc finish on these is holding up great in my shop, no rust after a few weeks of use. Threads are clean and the L9 alloy feels solid for the price, though they're a bit short for anything but thin plate work.