Mutual Screw & Supply

1"-8 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (10 / Pkg.)

1"-8 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$59.85 $83.12 In stock

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

  • Grade 5 Steel Yellow Zinc construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 10

Specifications

  • Thread Size: 1"-8
  • Length: 3-1/4"
  • Threads Per Inch: 8
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 10
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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)

Miles J. ★★★★★

The yellow zinc finish on these is a nice touch—makes them easy to spot in my parts bin, and the threads are clean enough to start by hand. The partial threading gave me just the right grip for a heavy flange I was bolting up, and all ten matched the listed size exactly.

Jason ★★★★★

Needed these for a heavy equipment repair and the Grade 5 steel really holds up under torque. The hex head fit my socket perfectly and the partial threading made alignment easy. Worked exactly as expected.

Isabella X. ★★★★★

The threading on these 1"-8 cap screws is clean and precise, and the yellow zinc finish looks like it’ll hold up fine in my shop. I needed a solid 3-1/4" length for a jig I’m building and the partially threaded design gave me the grip I wanted without any fuss.