Mutual Screw & Supply

7/8-9 X 4" Hex Head Cap Screws | Grade 8 Steel Zinc Plated | Partially Threaded (45 / Pkg.)

7/8-9 X 4" Hex Head Cap Screws | Grade 8 Steel Zinc Plated | Partially Threaded - Main image
$123.44 $173.86 In stock

7/8-9 x 4" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 8 Steel Zinc Plated construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 45

Specifications

  • Thread Size: 7/8-9
  • Length: 4"
  • Threads Per Inch: 9
  • Material: Steel
  • Grade: Grade 8
  • Finish: Zinc Plated
  • Thread Style: Partially Threaded
  • Pack Quantity: 45
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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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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)

Sebastian Q. ★★★★★

Finally a bolt that doesn't strip under high torque—the hex head grabbed my socket perfectly. These grade 8s are way tougher than the grade 5s I was using before, and the zinc plating looks clean out of the package.

Sophia Y. ★★★★★

The partial threading on these 7/8-9 screws made a big difference for my assembly work—easier to start by hand before torquing them down. The zinc plating looks clean and the Grade 8 steel gives me confidence they'll hold up under heavy loads. Exactly what I needed for the price.

Aurora J. ★★★★★

I needed some heavy-duty hex heads for a steel frame jig I’m building, and these Grade 8 zinc-plated screws fit the 7/8-9 size perfectly without slipping. The partially threaded section held tight in the tapped holes while the smooth shank let me adjust alignment easily. For the price per 45, these