Mutual Screw & Supply

MS21043-6 | Mil-Spec Self-Locking Nuts (7 / Pkg.)

MS21043-6 | Mil-Spec Self-Locking Nuts (7 / Pkg.) - Main image
$12.56 $19.32 In stock

These self-locking nuts are well suited to securing fasteners against vibration loosening.

  • Applications: Securing fasteners against vibration loosening

Specifications

  • Product type: Self-Locking Nuts
  • Measurement type: Imperial
  • Pack quantity: 7 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)

Julian ★★★★★

Installed these on a machine skid that sees constant vibration, and they haven't budged a bit after a week of testing. The self-locking feature really holds tight without galling the threads.

Robert ★★★★★

These little locknuts did exactly what I needed on the motorcycle's engine mount, and after a week of hard vibration not a single one has budged. The self-locking feature grip really works, and the package gave me just enough spares for future projects.

George R. ★★★★★

Used these on a lawn mower deck where bolts kept backing out. The locking collar grabbed tight and they haven't budged after a full season of mowing. Exactly what I needed for vibration-prone spots.