Mutual Screw & Supply

5/16-18 X 3/4" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc (200 / Pkg.)

5/16-18 X 3/4" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc - Main image
$39.07 $56.62 In stock

5/16-18 x 3/4" 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 200

Specifications

  • Thread Size: 5/16-18
  • Length: 3/4"
  • Threads Per Inch: 18
  • Material: Alloy Steel
  • Grade: PFC9
  • Finish: Yellow Zinc CR+6
  • Pack Quantity: 200
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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 (5.0 / 5 · 5 reviews)

Hannah J. ★★★★★

Yellow zinc coating is evenly applied, no flaking or bare spots after tightening down a whole machine frame. The PFC9 alloy steel feels dense and solid in hand, and all 200 threaded cleanly with no jams or cross-threading. USA-made quality shows in the uniform head height across the entire box.

Ava ★★★★★

The hex heads on these bolts grab a socket wrench perfectly, no slipping or rounding out. Great for mounting a heavy jig to my drill press table—so far not a single one has stripped.

Harper L. ★★★★★

I needed a solid batch of 5/16-18 bolts for a jig I'm building, and these cap screws fit the bill perfectly. The yellow zinc coating was consistent across all 200 pieces, and they drove easily with a socket without any stripping.