Mutual Screw & Supply

1/2-13 X 3-3/4" Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded | Alloy Steel Thermal Black Oxide (25 / Pkg.)

1/2-13 X 3-3/4" Socket Cap Screws | Flat Head Hex Socket Drive | Partially - Main image
$42.44 $61.51 In stock

These 1/2-13 x 3-3/4" 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
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 1/2-13
  • Length: 3-3/4"
  • 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: Partially Threaded
  • Thread size: 1/2-13
  • Length: 3-3/4"
  • Threads per inch: 13
  • 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 (4.6 / 5 · 5 reviews)

Elizabeth V. ★★★★★

The black oxide finish on these screws gave them a nice, uniform look right out of the package, and the partially threaded design seated perfectly in my jig setup. They tightened down smoothly with the hex drive and held firm under load.

Hazel ★★★★★

The black oxide finish on these screws looks professional and resisted my wrench scratches during assembly. Used them to secure a heavy steel bracket on my mill, and the partial threading gave just enough grip without bottoming out.

John J. ★★★★★

I needed some heavy-duty screws for a jig I was building, and these black oxide ones held up perfectly without any stripping during installation. The hex socket drive made it easy to get them tight even in a tight spot.