Mutual Screw & Supply

1-1/4-7 X 3-1/2" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc (20 / Pkg.)

1-1/4-7 X 3-1/2" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc (20 - Main image
$329.5 $514.84 In stock

1-1/4-7 x 3-1/2" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 8 Steel Yellow Zinc construction
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 20

Specifications

  • Thread Size: 1-1/4-7
  • Length: 3-1/2"
  • Threads Per Inch: 7
  • Material: Steel
  • Grade: Grade 8
  • Finish: Yellow Zinc CR+3
  • Pack Quantity: 20
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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 (4.6 / 5 · 5 reviews)

Avery G. ★★★★★

Threads are clean and the yellow zinc finish actually looks tougher than the hardware store stuff I usually grab. These seated flush without any binding, and the Grade 8 marking is a nice reassurance for the machine frame I’m bolting together.

Madison ★★★★★

These threads cut clean and the yellow zinc finish is even and consistent across all twenty bolts. I used them to bolt down a heavy motor mount and the grade 8 hardness gave me total confidence torquing them to spec.

John ★★★★★

Finally found some Grade 8 bolts that actually fit my heavy equipment build perfectly—the hex head grabbed my socket tight without slipping. The yellow zinc coating looks solid and should hold up fine in my shop.