Mutual Screw & Supply

5/16-18 X 1-3/8" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially Threaded (200 / Pkg.)

5/16-18 X 1-3/8" Hex Head Cap Screws | Grade 5 Steel Yellow Zinc | Partially - Main image
$35.02 $58.36 In stock

5/16-18 x 1-3/8" 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 200

Specifications

  • Thread Size: 5/16-18
  • Length: 1-3/8"
  • Threads Per Inch: 18
  • Material: Steel
  • Grade: Grade 5
  • Finish: Yellow Zinc CR+6
  • Thread Style: Partially Threaded
  • Pack Quantity: 200
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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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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)

Sophia ★★★★★

Used these to replace rusted bolts on my tractor’s mower deck—the yellow zinc coating is already holding up better than the old ones did. The partially threaded design made installation quick without stripping.

Carter N. ★★★★★

The hex heads fit my socket set perfectly, and the yellow zinc coating on these grade 5 bolts looks like it will hold up well in my shop. Used them to fasten a steel bracket on a trailer hitch—threads caught cleanly and the partial threading made alignment easy.

Madison W. ★★★★★

Needed these for a jig I was building and the partial thread is exactly what I wanted, so the unthreaded shank sits clean in the fixture. The yellow zinc finish looks uniform across all 200, no stripped heads on the first dozen I’ve torqued down.