Mutual Screw & Supply

5/8-18 X 1-1/4" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel Thermal Black Oxide (325 / Pkg.)

5/8-18 X 1-1/4" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel - Main image
$964.08 $1397.22 In stock

These 5/8-18 x 1-1/4" 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: 5/8-18
  • Length: 1-1/4"
  • 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: 5/8-18
  • Length: 1-1/4"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 325 per package
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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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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)

Benjamin ★★★★★

I’ve been using these in a jig I’m building, and the hex socket drive makes torquing them down really easy without slipping. The USA made alloy steel feels sturdy, and the black oxide finish hasn’t shown any wear after a few adjustments.

Jason C. ★★★★★

I needed a bulk supply of 5/8-18 screws for jig building, and these fit the bill perfectly. The hex socket drive makes it easy to torque them down with a standard Allen key, and the black oxide finish seems durable so far.

Amelia M. ★★★★★

The black oxide finish on these gives them a nice uniform look, and they’re exactly the right spec for my jig builds—no fiddling with tolerance. Threads cut cleanly into the alloy steel, and a full box of 325 means I won’t be reordering for a while.