Mutual Screw & Supply

7/16-20 X 3-1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

7/16-20 X 3-1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow - Main image
$84.74 $112.99 In stock

7/16-20 x 3-1/2" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade L9 Alloy Steel Yellow Zinc construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 25

Specifications

  • Thread Size: 7/16-20
  • Length: 3-1/2"
  • Threads Per Inch: 20
  • Material: Alloy Steel
  • Grade: Grade L9
  • Finish: Yellow Zinc CR+3
  • 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 (5.0 / 5 · 5 reviews)

Olivia M. ★★★★★

I needed a high-strength bolt for a heavy equipment repair, and the Grade L9 steel on these handled the torque beautifully with no stripping. The partially threaded design let me get a deep enough grip without wasting shank length.

Olivia X. ★★★★★

These threads cut cleanly without any binding, and the yellow zinc coating looks professional on my shop equipment. The 3-1/2" length was perfect for bolting through a thick steel plate.

Ellie ★★★★★

Used them to fasten a heavy bracket to a steel beam—the partially threaded design made alignment a breeze. The yellow zinc coating looks solid and the hex head grabbed my socket perfectly.