Mutual Screw & Supply

3/8-24 X 1-3/8" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc | Fully Threaded (100 / Pkg.)

3/8-24 X 1-3/8" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc | - Main image
$56.49 $79.57 In stock

3/8-24 x 1-3/8" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 8 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: 3/8-24
  • Length: 1-3/8"
  • Threads Per Inch: 24
  • Material: Steel
  • Grade: Grade 8
  • 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)

Emma J. ★★★★★

Needed a set of high-strength fasteners for a tractor linkage repair, and these grade 8 cap screws fit the bill perfectly. The yellow zinc finish looks good and should resist corrosion well, plus the fully threaded shaft made installation a breeze.

Michael ★★★★★

The threads on these grade 8 bolts are clean and consistent, made tightening them with a socket feel smooth. They’ve held up perfectly securing a heavy jig on my drill press so far.

Hannah Q. ★★★★★

The hex head on these cap screws has a really clean, precise fit for my socket set—no wobble at all. I used a full 100-pack on a trailer frame, and the yellow zinc coating looks like it’ll hold up against the weather. Exactly the USA-made quality I was hoping for.