Mutual Screw & Supply

5/8-18 X 3-1/4" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc (150 / Pkg.)

5/8-18 X 3-1/4" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc - Main image
$277.48 $402.15 In stock

5/8-18 x 3-1/4" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • PFC9 Alloy Steel Yellow Zinc construction
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 150

Specifications

  • Thread Size: 5/8-18
  • Length: 3-1/4"
  • Threads Per Inch: 18
  • Material: Alloy Steel
  • Grade: PFC9
  • Finish: Yellow Zinc CR+6
  • Pack Quantity: 150
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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)

Olivia ★★★★★

These bolts fit perfectly in my jig fixture, and the yellow zinc coating looks like it’ll hold up well in my shop. The hex heads grabbed my socket without any slippage.

Leo ★★★★★

I needed a heavy-duty bolt for a press repair and these hex heads seated perfectly with a socket wrench. The PFC9 alloy feels really solid and the yellow zinc coating looks like it'll hold up well.

Hazel ★★★★★

I've been using these bolts for heavy equipment repair and the yellow zinc finish holds up well against rusting. The hex head gives a solid grip with a 5/8 socket, and they thread smoothly into pre-tapped holes.