Mutual Screw & Supply

1/4-28 X 6-1/2" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc (350 / Pkg.)

1/4-28 X 6-1/2" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc (350 - Main image
$449.05 $670.23 In stock

1/4-28 x 6-1/2" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 8 Steel Yellow Zinc construction
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 350

Specifications

  • Thread Size: 1/4-28
  • Length: 6-1/2"
  • Threads Per Inch: 28
  • Material: Steel
  • Grade: Grade 8
  • Finish: Yellow Zinc CR+3
  • Pack Quantity: 350
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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 (4.0 / 5 · 5 reviews)

Claire ★★★★★

These bolts are perfect for heavy equipment repairs. The hex head gives a solid bite from the socket, and the threads ran through the nut without any binding. Nice to get a full box of US-made Grade 8 for a fair price.

Daniel J. ★★★★☆

I needed longer bolts for a milling machine rebuild and these fit the bill perfectly—the hex heads grab a socket cleanly. The Grade 8 steel feels reassuringly solid, though the 350-count box is a lot for a small shop.

Abigail ★★★★☆

The yellow zinc coating on these is even and consistent across all 350 pieces, which I appreciate for outdoor equipment. They threaded smoothly into my steel brackets without any binding. Only wish they offered these in a stainless option for my marine projects.