Mutual Screw & Supply

5/16-18 X 4-1/2" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (50 / Pkg.)

5/16-18 X 4-1/2" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$31.96 $43.19 In stock

5/16-18 x 4-1/2" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 5 Steel Yellow Zinc construction
  • Partially Threaded
  • Hex head for wrench or socket drive
  • Sold in packs of 50

Specifications

  • Thread Size: 5/16-18
  • Length: 4-1/2"
  • Threads Per Inch: 18
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • 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 (4.6 / 5 · 5 reviews)

Grace F. ★★★★★

The partial threading on these 5/16-18 screws made installation into pre-tapped holes much smoother than fully threaded bolts. They feel solid and bite well with a socket wrench.

Natalie R. ★★★★★

I needed these for a tractor implement and the partial threading makes them grab nicely without binding up. The yellow zinc finish seems solid enough for outdoor use.

Joshua ★★★★★

Used these on a small machinery rebuild and the partially threaded design made installation a breeze. The yellow zinc finish looks clean and seems like it will resist rust well.