Mutual Screw & Supply

5/8-11 X 3-1/4" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel Thermal Black Oxide (75 / Pkg.)

5/8-11 X 3-1/4" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel - Main image
$198.84 $268.7 In stock

These 5/8-11 x 3-1/4" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Hex Socket Drive
  • Thread size: 5/8-11
  • Length: 3-1/4"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread size: 5/8-11
  • Length: 3-1/4"
  • Threads per inch: 11
  • Measurement type: Inch
  • Pack quantity: 75 per package
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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 (4.8 / 5 · 5 reviews)

Charlotte G. ★★★★★

The hex socket drive fit my torque wrench perfectly with zero play, and all 75 screws came out with a consistent, clean thread cut. I've used a few boxes on our machining fixtures now and not a single stripped head or burr to complain about.

Ella Y. ★★★★★

The thermal black oxide finish is holding up great so far, no rust spots after a week in my shop. Hex socket drive seated cleanly with an Allen key, and the alloy steel feels plenty rigid for a jig I'm building.

Benjamin P. ★★★★★

Needed a batch of 5/8-11 x 3-1/4" socket cap screws for a jig I’m building, and these from the 75-pack fit perfectly without any burs. The hex socket drive gave a solid bite with my Allen wrench, and the thermal black oxide finish looks durable and clean.