Mutual Screw & Supply

7/8-9 X 4" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | Partially Threaded (45 / Pkg.)

7/8-9 X 4" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | - Main image
$200.01 $294.13 In stock

A307 Grade B Steel Zinc Plated hex head cap screws, partially threaded, size 7/8-9 x 4". 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: 4"
  • Threads Per Inch: 9
  • Material: A307 Grade B Steel Zinc Plated
  • Finish: Zinc Plated CR+3
  • 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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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)

Henry L. ★★★★★

Used these for a heavy equipment repair last week—the zinc plating held up well even with some rain exposure. The threads engaged cleanly on the first pass, and the partial threading gave me just the right grip depth for the joint.

William ★★★★★

Finally, a bolt that threads smooth right out of the box without fighting the plating. The zinc finish on these looks uniform and hasn't flaked during tightening, which is a nice change. Perfect for my shop jig builds.

Evelyn ★★★★★

I needed some heavy-duty bolts for a machinery repair and the partial threading on these A307 Grade B steel ones made alignment much easier. The zinc coating looks consistent and should hold up fine in my shop.