Mutual Screw & Supply

M5-0.8 X 40mm Socket Cap Screws | Hex Socket Drive | Partially Threaded | Class 8.8 Alloy Steel Thermal Black Oxide (400 / Pkg.)

M5-0.8 X 40mm Socket Cap Screws | Hex Socket Drive | Partially Threaded | Class - Main image
$32.16 $45.3 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
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M5-0.8
  • Length: 40mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Grade: Class 8.8
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M5-0.8
  • Length: 40mm
  • Measurement type: Metric
  • Pack quantity: 400 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)

Andrew ★★★★★

I needed some longer M5s for a jig I'm building, and the 40mm length and partially threaded design worked perfectly for clamping thick stock. The hex socket drive made tightening them down in tight spots a breeze.

Alexander Z. ★★★★★

The black oxide finish on these screws gave them a nice, uniform look straight out of the package, and the hex socket drive made installation a breeze on my fixture. They grabbed perfectly in the tapped holes with no stripping issues.

Steven B. ★★★★★

I needed a batch of these for a custom jig I’m building, and the partially threaded design saved me time aligning the clamp plates. The hex socket drive seated firmly without stripping, and the class 8.8 alloy steel feels tough enough for repeated adjustments.