Mutual Screw & Supply

3/4-10 X 3-1/4" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | Partially Threaded (75 / Pkg.)

3/4-10 X 3-1/4" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc - Main image
$171.44 $241.47 In stock

A307 Grade B Steel Zinc Plated hex head cap screws, partially threaded, size 3/4-10 x 3-1/4". 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: 3/4-10
  • Length: 3-1/4"
  • Threads Per Inch: 10
  • Material: A307 Grade B Steel Zinc Plated
  • Finish: Zinc Plated CR+3
  • Thread Style: Partially Threaded
  • Pack Quantity: 75
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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)

George ★★★★★

Tackling a big equipment assembly project, I was impressed these 3/4-10 x 3-1/4" hex screws drove in smoothly without any binding. The zinc plating gave them a clean, consistent finish, and having 75 per package meant I didn't run short.

Lily ★★★★★

These 3/4-10 x 3-1/4" heavy hex cap screws threaded perfectly into my equipment frame without any binding. The A307 Grade B steel feels solid and the partial threading made installation quicker than fully threaded bolts.

Victoria G. ★★★★★

The zinc coating on these bolts is smooth and even, no flaking like cheaper hardware. Threads cut clean into the nut, and the partially threaded design is perfect for my trailer hitch build.