Mutual Screw & Supply

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

1-1/8-12 X 3-1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow - Main image
$389.24 $526 In stock

1-1/8-12 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 12

Specifications

  • Thread Size: 1-1/8-12
  • 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: 12
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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)

Henry ★★★★★

The yellow zinc coating feels really solid and the hex heads are a breeze to get a socket on without stripping. These fully threaded bolts are holding our shop press together without any issues.

Hannah ★★★★★

These bolts are a perfect fit for the heavy equipment frame I'm rebuilding, and the L9 alloy steel feels noticeably tougher than standard hardware. The yellow zinc coating looks clean and seems like it'll hold up well in our shop environment.

Sophia A. ★★★★★

I needed some seriously strong bolts for a custom trailer hitch, and the L9 alloy steel on these feels rock-solid. The yellow zinc coating gives them a nice, clean look that resists rust.