Mutual Screw & Supply

M3 Lock Washers | 18-8 Stainless Steel Black Oxide (2000 / Pkg.)

M3 Lock Washers | 18-8 Stainless Steel Black Oxide (2000 / Pkg.) - Main image
$23.1 $35 In stock

These M3 lock washers are manufactured from 18-8 Stainless Steel with a black oxide finish. They are well suited to preventing fastener loosening under vibration.

  • Material and finish: 18-8 Stainless Steel, Black Oxide finish
  • Thread size: M3
  • Applications: Preventing fastener loosening under vibration

Specifications

  • Product type: Lock Washers
  • Material: 18-8 Stainless Steel
  • Finish: Black Oxide
  • Grade: 18/8
  • Thread size: M3
  • Measurement type: Metric
  • Pack quantity: 2000 per package

Please note: This item is excess stock and is sold non-cancelable, non-refundable, and non-returnable. Please call us with any questions about this item before ordering.

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)

Ella F. ★★★★★

Tried using these on a small robotics project where vibrations are constant, and they held everything in place perfectly. The stainless steel with black oxide gives them a nice finished look too.

Leo D. ★★★★★

The black oxide finish on these washers is surprisingly uniform across all 2000 pieces—no flaking or rough edges when I slid them onto the bolts. They’ve held up perfectly under a week of vibration testing on the motor mounts, which is exactly what I needed.

Edward ★★★★★

Exactly the right size for securing M3 fasteners on a small robotics project, and the black oxide finish hasn't flaked off after a few days of vibration testing. Pack of 2000 feels like a lifetime supply for my workbench.