Mutual Screw & Supply

M6-1 X 40mm Socket Cap Screws | Hex Socket Drive | Partially Threaded | Class 8.8 Alloy Steel Thermal Black Oxide (400 / Pkg.)

M6-1 X 40mm Socket Cap Screws | Hex Socket Drive | Partially Threaded | Class - Main image
$36.38 $53.5 In stock

These M6-1 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: M6-1
  • 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: M6-1
  • 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 (4.8 / 5 · 5 reviews)

Amelia G. ★★★★★

Pulled these out for a precision assembly this morning and the partially threaded design made alignment noticeably easier. The black oxide finish feels more durable than the zinc-coated ones I've used before.

Joseph ★★★★★

The partial threading on these M6-1 x 40mm screws makes positioning in jigs way easier, and the black oxide finish gives them a clean, professional look right out of the box. Threads are crisp and the hex socket engages perfectly with my driver. For a bulk pack of 400, the consistency in length and

Adam ★★★★★

Finally, a set of M6-1 screws that actually hold up under torque—the hex socket drive didn’t strip on me even after multiple tightenings. I used them for a jig build and the partial thread gave just the right grip depth.