Mutual Screw & Supply

1"-8 X 3-1/2" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated | Partially Threaded (35 / Pkg.)

1"-8 X 3-1/2" Heavy Hex Cap Screws | USA Made | A307 Grade B Steel Zinc Plated - Main image
$164.27 $273.79 In stock

A307 Grade B Steel Zinc Plated hex head cap screws, partially threaded, size 1"-8 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: 1-8
  • Length: 3-1/2"
  • Threads Per Inch: 8
  • Material: A307 Grade B Steel Zinc Plated
  • Finish: Zinc Plated CR+3
  • Thread Style: Partially Threaded
  • Pack Quantity: 35
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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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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)

Kevin E. ★★★★★

The zinc plating on these looks clean and even, should hold up fine in my shop environment. Used them to bolt down a heavy workbench frame and they threaded in smoothly without any binding.

Stella ★★★★★

These are exactly what I needed for a heavy machinery repair, and the zinc plating looks like it will resist rust well. The threads are clean and started easily in the pre-tapped holes.

Eva L. ★★★★★

The partially threaded shank made these cap screws grip perfectly when I mounted heavy equipment to steel beams. The zinc coating looks clean and uniform, and the threads cut smoothly without binding or stripping the metal.