Mutual Screw & Supply

M5-0.8 X 40mm Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (300 / Pkg.)

M5-0.8 X 40mm Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded - Main image
$32.31 $46.83 In stock

These M5-0.8 x 40mm 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: Button Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M5-0.8
  • Length: 40mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Button Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Grade: Class 12.9
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M5-0.8
  • Length: 40mm
  • Measurement type: Metric
  • Pack quantity: 300 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 (5.0 / 5 · 5 reviews)

Thomas ★★★★★

I needed a solid batch of fasteners for building a custom jig, and these M5 screws threaded cleanly into the steel without any binding. The 300-count pack will last me through several projects.

Penelope L. ★★★★★

The black oxide finish on these M5 screws gives them a nice, uniform look, and the hex socket drive bites cleanly without stripping. I've used about half the pack on a tooling fixture and every one threaded in smooth and seated tight, exactly what I needed for class 12.9 strength.

Leo ★★★★★

Ordered these for a jig I’m building and the threading is perfectly clean all the way down, which made them seat smoothly without any cross-threading. The 12.9 alloy steel feels incredibly rigid for the price, and the black oxide gives them a solid, non-glare look that’s held up during assembly.