Mutual Screw & Supply

7/16-20 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

7/16-20 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$25.77 $36.29 In stock

7/16-20 x 3-1/4" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 5 Steel Yellow Zinc construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 25

Specifications

  • Thread Size: 7/16-20
  • Length: 3-1/4"
  • Threads Per Inch: 20
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 25
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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)

Avery ★★★★★

The yellow zinc finish looks even better in person, and the partial thread gave me a solid grip when I torqued them down on a jig I’m building. Wrench fit was snug with no rounding on the hex head.

Evelyn F. ★★★★★

These bolts threaded smoothly into a 7/16 die for cleaning up a tractor hitch – the zinc coating held up great under the wrench. The partial threading made alignment easy on that stubborn bracket.

Avery ★★★★★

I needed partially threaded bolts for a custom jig, and these fit perfectly—the yellow zinc coating’s holding up well against a bit of moisture in my shop.