Mutual Screw & Supply

1/4-28 X 3/8" Hex Head Cap Screws | Grade 8 Steel Yellow Zinc | Fully Threaded (4000 / Pkg.)

1/4-28 X 3/8" Hex Head Cap Screws | Grade 8 Steel Yellow Zinc | Fully Threaded - Main image
$158.76 $260.26 In stock

1/4-28 x 3/8" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 8 Steel Yellow Zinc construction
  • Fully Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 4000

Specifications

  • Thread Size: 1/4-28
  • Length: 3/8"
  • Threads Per Inch: 28
  • Material: Steel
  • Grade: Grade 8
  • Finish: Yellow Zinc CR+6
  • Thread Style: Fully Threaded
  • Pack Quantity: 4000
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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 (4.8 / 5 · 5 reviews)

Lucy ★★★★★

These Grade 8 bolts were exactly what I needed to finish a heavy-duty jig I've been building. The yellow zinc coating gives them a nice, consistent look and the fully threaded shaft made alignment a breeze. A solid 4000 count box means I won't be running out anytime soon.

Evelyn ★★★★★

Perfect size for replacing worn bolts on my mill. The hex head fit my socket set without slipping, and the yellow zinc finish looks clean against the steel frame.

Thomas ★★★★★

Needed a solid batch for a jig I’m building, and these grade 8 screws with that yellow zinc coating feel tougher than the standard hardware store stuff. The hex head drives smoothly with a socket, no stripping or wobbling.