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Self Lock Nut/Steel, 1/4-28 MS21045-4 pack of 100

Self Lock Nut/Steel, 1/4-28 MS21045-4 pack of 100
Out of Stock
Self Lock Nut/Steel, 1/4-28 MS21045-4 pack of 100
SELF LOCK NUT/Steel, 1/4-28 MS21045-4 pack of 100
SELF LOCK NUT/Steel, 1/4-28
8-32 Self-Locking Nut
  • All metal, 450F
  • Hexagon, Regular Height
  • Castelated


Product Codes

Mfr Part No:MS21045-4
MIL SPEC:MS21045-4
ECCN:EAR99
MIL SPEC:MS21045-4
SCHEDULE B CODE:8803.30.0050


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  • Stock: Out of Stock
  • Manufacturer Part #: MS21045-4

AI disclosure: this description was generated with AI assistance from this product's own listing data.

$64.92
Cross-referenced against Piper IPC (page 16) Login to view source catalog

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Returns & refund summary

  • 30-day return window — with prior return authorization, unopened in original packaging.
  • Restocking fee: 20% on unopened items, 30% on open-box items.
  • Refund processing fee: 5.51% applies only to customer-remorse returns and customer-initiated cancellations. If a problem is our fault (our cancellation, unavailability, wrong item, confirmed defect, or shipping damage) your refund is 100% with no fees.
  • Return shipping: paid by buyer on customer-remorse returns; we pay return shipping when the problem is our fault.
  • Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.

Full terms: Return Policy.

Authenticity & authorization

We source products from manufacturers, authorized distributors, and established aviation suppliers as applicable. We are an independent reseller; we do not claim direct dealer or authorized-representative status for any brand. Documentation, source, and warranty eligibility vary by product and are confirmed on request.

See our full Manufacturer Authorizations page for the current per-brand status.

Need traceability paperwork?

If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.

Shipping

Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.