Mutual Screw & Supply

5/16-18 X 5/8" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Fully Threaded (200 / Pkg.)

5/16-18 X 5/8" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Fully Threaded - Main image
$23.73 $35.96 In stock

5/16-18 x 5/8" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 5 Steel Yellow Zinc construction
  • Fully Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 200

Specifications

  • Thread Size: 5/16-18
  • Length: 5/8"
  • Threads Per Inch: 18
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Fully Threaded
  • Pack Quantity: 200
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When it ships

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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)

Andrew ★★★★★

I used these to rebuild a trailer hitch, and the hex heads seated perfectly with a socket wrench without any stripping. The yellow zinc coating looks clean and seems like it’ll hold up well against rust.

Eva D. ★★★★★

Threading was clean on every one I checked, and the yellow zinc finish looks consistent across the whole box. The hex heads seated snugly in my socket without any stripping.

Hannah V. ★★★★★

I needed a full box for a trailer repair job, and these Grade 5 bolts with yellow zinc came perfectly packed and threaded cleanly the whole way. The hex heads let my socket grip tight without any stripping—exactly what you want for a heavy-duty assembly.