Mutual Screw & Supply

9/16-18 X 1-1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow Zinc | Fully Threaded (25 / Pkg.)

9/16-18 X 1-1/2" Hex Head Cap Screws | USA Made | Grade L9 Alloy Steel Yellow - Main image
$74.74 $103.8 In stock

9/16-18 x 1-1/2" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade L9 Alloy Steel Yellow Zinc construction
  • Fully Threaded
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 25

Specifications

  • Thread Size: 9/16-18
  • Length: 1-1/2"
  • Threads Per Inch: 18
  • Material: Alloy Steel
  • Grade: Grade L9
  • Finish: Yellow Zinc CR+3
  • Thread Style: Fully 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 (5.0 / 5 · 5 reviews)

Jacob D. ★★★★★

The yellow zinc coating held up perfectly through a greasy weekend of assembly work—no scratches or flaking. Threads cut clean with no binding, and the fully threaded length gave me solid engagement on a custom mounting bracket. For 25 pieces at this price, hard to beat the grade L9 strength.

Chloe G. ★★★★★

I’d been using standard grade 5 bolts, but these L9s are noticeably tougher when torquing down heavy equipment mounts. The yellow zinc coating looks clean and hasn’t shown any rust after a few days in a damp shop.

Carter A. ★★★★★

The fully threaded design made installation a breeze with my socket set, and the yellow zinc coating looks like it will hold up well in my shop environment. I also appreciate that they’re Grade L9 steel and made in the USA, which gives me confidence in their strength.