Mutual Screw & Supply

1-1/4-12 X 3-1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Fully Threaded (8 / Pkg.)

1-1/4-12 X 3-1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow - Main image
$296.09 $477.57 In stock

1-1/4-12 x 3-1/2" 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 8

Specifications

  • Thread Size: 1-1/4-12
  • Length: 3-1/2"
  • Threads Per Inch: 12
  • Material: Alloy Steel
  • Grade: Grade L9
  • Finish: Yellow Zinc CR+3
  • Thread Style: Fully Threaded
  • Pack Quantity: 8
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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)

Joseph H. ★★★★★

The yellow zinc finish looks great and feels tough, and the threading is clean all the way down—no snags when I spun the nut on. These L9 alloy screws feel seriously solid for the price, exactly what I needed for a heavy equipment fix.

Kevin ★★★★★

Installed these on a skid loader attachment and the fully threaded length made cinching everything down way easier than dealing with a partial thread. The yellow zinc finish hasn't shown a speck of rust after a few rainy weeks, which surprised me.

Robert K. ★★★★★

I needed some heavy-duty fasteners for a farm implement repair, and these L9 alloy steel screws handled the torque without stripping. They're fully threaded which made getting a snug fit on the bracket much easier.