Mutual Screw & Supply

5/16-18 X 1" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc (200 / Pkg.)

5/16-18 X 1" Hex Head Cap Screws | USA Made | PFC9 Alloy Steel Yellow Zinc (200 - Main image
$42.11 $66.84 In stock

5/16-18 x 1" 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: 1"
  • Threads Per Inch: 18
  • Material: Alloy Steel
  • Grade: PFC9
  • Finish: Yellow Zinc CR+6
  • Pack Quantity: 200
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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 (4.6 / 5 · 5 reviews)

George L. ★★★★★

I’ve used a lot of hex head bolts before, but these really bite cleanly with a socket—no stripping on the first tighten. The 1-inch length is spot-on for my current small-frame assembly job.

Andrew R. ★★★★★

The yellow zinc coating on these cap screws is smooth and consistent, making them easy to thread even with oily fingers. I used them to secure a jig on my milling table and they seated perfectly without binding. For machine assembly, the PFC9 alloy steel feels noticeably tougher than the usual hardw

Claire ★★★★★

The hex head on these cap screws grabs really well with a socket, which made tightening them in tight spaces much easier. The yellow zinc coating looks clean and has held up fine so far in my garage, no rust after a few weeks. Glad to find USA-made hardware that actually fits standard wrenches witho