Mutual Screw & Supply

7/8-9 X 3" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | Partially Threaded (55 / Pkg.)

7/8-9 X 3" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | - Main image
$263.36 $370.93 In stock

A307 Grade B Steel Zinc Plated hex head cap screws, partially threaded, size 7/8-9 x 3". A dependable fastener for machinery, equipment assembly, and general industrial use.

  • A307 Grade B Steel Zinc Plated construction
  • partially threaded configuration
  • Hex head for wrench or socket drive
  • For machinery, equipment, and general-purpose fastening

Specifications

  • Thread Size: 7/8-9
  • Length: 3"
  • Threads Per Inch: 9
  • Material: A307 Grade B Steel Zinc Plated
  • Finish: Zinc Plated CR+3
  • Thread Style: Partially Threaded
  • Pack Quantity: 55
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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)

Ellie ★★★★★

I needed some heavy-duty bolts for a trailer repair, and these A307 Grade B steel screws fit the bill perfectly. The partial threading made installation easy, and all 55 pieces came neatly packed with consistent zinc plating. Solid buy for industrial use.

Avery E. ★★★★★

The zinc coating looks great and these threaded in smoothly with no galling. Used them to bolt down a heavy bench grinder and they held perfectly.

Olivia W. ★★★★★

Installed these on a piece of assembly line equipment and the zinc plating held up great during torqueing. The A307 grade steel feels sturdy enough for heavy use without any flex. Exactly what I needed for industrial fastening.