Mutual Screw & Supply

MS21075L3 | Mil-Spec Self-Locking Nuts (25 / Pkg.)

MS21075L3 | Mil-Spec Self-Locking Nuts (25 / Pkg.) - Main image
$21.12 $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: 25 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.

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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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If you need a refund

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Samuel ★★★★★

Used a full pack of these on a trailer fender bracket that keeps shaking loose on rough roads, and the nylon insert grabs tight enough that I haven't had to touch a single one since. They thread on smooth but definitely don't back off on their own, which is exactly what I needed for that constant vi

Joseph N. ★★★★★

The self-locking mechanism held my shed's bolt tight even after a bumpy ride to the dump. Each nut threaded smoothly and stayed put without any play—no more retightening for me. Absolutely solid fix for vibration-prone spots.

Timothy I. ★★★★★

Used a full package on the trailer hitch and suspension brackets, and nothing’s worked loose after a month of daily driving. The nylon insert grips tight from the first thread, and they’re easy to spin on with a wrench but hold like they’re welded once seated. Exactly what I needed for vibration-hea