Mutual Screw & Supply

1/2-20 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (25 / Pkg.)

1/2-20 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$32.69 $43.58 In stock

1/2-20 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 25

Specifications

  • Thread Size: 1/2-20
  • Length: 3-1/4"
  • Threads Per Inch: 20
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 25
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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 (4.6 / 5 · 5 reviews)

Timothy ★★★★★

The yellow zinc coating seems even more durable than the plain steel ones I usually get, and the partially threaded shaft made aligning my jig’s mounting plate straightforward.

Miles ★★★★★

Needed a set of partially threaded hex bolts for a jig I was building, and these fit the bill perfectly. The threads are clean and the Grade 5 rating gives me confidence they'll hold up under load.

Steven ★★★★★

The hex head fits my socket wrench perfectly, and the yellow zinc finish looks great on my trailer hitch. These grade 5 bolts feel solid and held up fine under heavy torque.