Mutual Screw & Supply

1/4-28 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (100 / Pkg.)

1/4-28 X 3-1/4" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$31.8 $44.16 In stock

1/4-28 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 100

Specifications

  • Thread Size: 1/4-28
  • Length: 3-1/4"
  • Threads Per Inch: 28
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 100
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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)

Edward ★★★★★

These fit perfectly on my milling machine’s T-slots and the hex heads grab a socket without slipping. The yellow zinc finish looks clean and should resist rust well. A solid buy for anyone needing strong, partially threaded fasteners.

Riley R. ★★★★★

It took me a while to find partially threaded screws in this exact size, and these fit the bill perfectly. The hex heads seated cleanly into my socket without any stripping.

Ella D. ★★★★★

The yellow zinc finish looks sharp and the partial threading gives just the right amount of grip for my equipment jig. Head fits a standard socket perfectly, and all 100 arrived without a single stripped thread.