Mutual Screw & Supply

5/8-11 X 3" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | Partially Threaded (100 / Pkg.)

5/8-11 X 3" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | - Main image
$116.86 $188.48 In stock

A307 Grade B Steel Zinc Plated hex head cap screws, partially threaded, size 5/8-11 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: 5/8-11
  • Length: 3"
  • Threads Per Inch: 11
  • Material: A307 Grade B Steel Zinc Plated
  • Finish: Zinc Plated CR+3
  • Thread Style: Partially Threaded
  • Pack Quantity: 100
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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)

Brian ★★★★★

These are going straight onto a piece of equipment that sees daily vibration, and the zinc finish has held up perfectly with no signs of rust yet. The partial threads grabbed exactly where I needed them to for a solid, flush fit, and all 100 in the package had clean, consistent plating.

Alexander ★★★★★

Threads cut clean and the hex heads didn't strip even with a 3/4" impact gun on a stubborn trailer hitch. The zinc plating held up fine after a few days of rain on the job site, too. These are my new go-to for structural steel work.

Leo U. ★★★★★

The zinc coating on these bolts is uniform and clean—no flaking or rough spots like cheaper hardware. Threads started smoothly by hand and cinched down tight with my wrench on a trailer hitch build.