Mutual Screw & Supply

3/8-16 X 3" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Partially Threaded (50 / Pkg.)

3/8-16 X 3" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | - Main image
$82.55 $121.4 In stock

3/8-16 x 3" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade L9 Alloy Steel Yellow Zinc construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 50

Specifications

  • Thread Size: 3/8-16
  • Length: 3"
  • Threads Per Inch: 16
  • Material: Alloy Steel
  • Grade: Grade L9
  • Finish: Yellow Zinc CR+3
  • Thread Style: Partially Threaded
  • Pack Quantity: 50
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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 (4.4 / 5 · 5 reviews)

Emily ★★★★★

Had to swap out some old bolts on a heavy press, and these L9 hex heads threaded in smooth as butter with zero play. The yellow zinc finish looks solid and hasn't shown any rust after a week in a humid shop.

Riley ★★★★★

Used these to secure a milling machine base, and the Grade L9 steel held up perfectly under heavy torque with no stripping. The yellow zinc coating is a nice touch for resisting shop grime.

Henry G. ★★★★☆

The partially threaded section makes seating these bolts in a fixture a lot quicker than I expected. Grade L9 feels plenty stout for the machinery repair I used them on, and the hex heads grabbed cleanly with a socket. Only thing is the yellow zinc finish is a bit more matte than shiny, but that’s c