Mutual Screw & Supply

5/8-11 X 3" Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide (25 / Pkg.)

5/8-11 X 3" Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | - Main image
$36.79 $51.82 In stock

These 5/8-11 x 3" 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
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/8-11
  • Length: 3"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/8-11
  • Length: 3"
  • Threads per inch: 11
  • Measurement type: Inch
  • Pack quantity: 25 per package
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Joseph V. ★★★★★

Finally, a set of 5/8-11 screws that actually hold up under heavy clamping loads without stripping the hex socket. The black oxide finish looks professional and seems to resist rust better than the zinc-plated ones I've used before. Perfect for my current jig rebuild project.

Robert F. ★★★★★

Just got these for a tooling fixture at work and the black oxide finish is really uniform, no flaking. The hex socket drove in clean with no cam-out, which I appreciate.

Brian A. ★★★★★

Installed these in a jig for a production run, and the hex socket drive made tightening them with a ball-end Allen key effortless. The fully threaded design gave me solid grip through the entire 3-inch length, too.