Mutual Screw & Supply

3/8-16 X 3-1/4" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc (425 / Pkg.)

3/8-16 X 3-1/4" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc - Main image
$318.7 $448.88 In stock

3/8-16 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 425

Specifications

  • Thread Size: 3/8-16
  • Length: 3-1/4"
  • Threads Per Inch: 16
  • Material: Alloy Steel
  • Grade: PFC9
  • Finish: Yellow Zinc CR+6
  • Pack Quantity: 425
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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)

Charlotte A. ★★★★★

Bought these for a repair project and the hex heads drove cleanly with a socket, no stripping. The 3-1/4" length was just right for what I needed, and the yellow zinc finish looks solid.

George ★★★★★

The yellow zinc coating is holding up great against the grease and grime in my shop, and these hex heads fit my socket perfectly. Threads are clean and uniform across all 425 screws, so threading them into equipment went without a hitch.

Hazel G. ★★★★★

I needed a full box for a job reassembling some old equipment, and these hex heads threaded in smooth and tight every time. The USA-made alloy steel feels way more solid than the standard bin bolts I've used before.