Mutual Screw & Supply

5/8-11 X 3-1/2" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | Partially Threaded (100 / Pkg.)

5/8-11 X 3-1/2" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc - Main image
$151.38 $207.37 In stock

A307 Grade B Steel Zinc Plated hex head cap screws, partially threaded, size 5/8-11 x 3-1/2". 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: 3-1/2"
  • 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 (4.4 / 5 · 5 reviews)

Harper A. ★★★★★

I needed some heavy-duty bolts for a repair stand I'm building, and these A307 Grade B steel ones feel solid with that zinc coating looking clean. The 100-count box is a good value for the money, no complaints.

Sophia ★★★★★

The zinc plating on these bolts looks flawless out of the box, no chips or dull spots anywhere across the hundred pieces. I used them to mount a heavy equipment frame and the 5/8-11 threads bit in clean without any galling, so they've earned a spot in my regular fastener rotation.

Sophia ★★★★★

The zinc coating on these bolts looks good and the threads cut cleanly into the steel I was mounting. Used them to fasten a heavy bracket to a trailer frame and they seated perfectly with no wobble.