Mutual Screw & Supply

MS21042-3 | Mil-Spec Self-Locking Nuts | Steel (1000 / Pkg.)

MS21042-3 | Mil-Spec Self-Locking Nuts | Steel (1000 / Pkg.) - Main image
$80.25 $118.01 In stock

These self-locking nuts are manufactured from Steel. They are well suited to securing fasteners against vibration loosening.

  • Material and finish: Steel
  • Applications: Securing fasteners against vibration loosening

Specifications

  • Product type: Self-Locking Nuts
  • Material: Steel
  • Finish: Plain
  • Measurement type: Imperial
  • Pack quantity: 1000 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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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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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 (5.0 / 5 · 5 reviews)

Joshua ★★★★★

Replaced the standard lock washers on my motorcycle's exhaust hangers with these, and after a hundred miles of rough roads not a single nut has budged. The self-locking feature really holds tight against vibration, and the steel finish is clean enough to leave visible. Exactly what I needed for peac

Madison ★★★★★

Installed a batch on my lawn mower’s vibration-prone deck bolts and not a single one has backed off after a full season. The self-locking mechanism really delivers that mil-spec reliability.

Ava T. ★★★★★

These nuts held tight on my trailer hitch bolts even after a bumpy 200-mile trip. The steel construction gives me confidence these won't strip out like cheaper zinc ones. They're a solid choice for any vibration-prone application.