The **MS16625 series of self-locking hex nuts** represents a critical category of military-standard aviation hardware, designed to maintain secure fastening under dynamic conditions where vibration, temperature fluctuations, and structural stresses are prevalent. This standard part often supersedes or is interchangeable with various legacy AN (Army-Navy) and NAS (National Aerospace Standard) fasteners, providing a reliable solution for critical assemblies across numerous aircraft platforms.
Overview
The MS16625 is a specific military standard for an all-metal, prevailing torque, self-locking hex nut. These nuts are engineered to resist loosening when subjected to vibration and varying loads, making them indispensable in aircraft engine assemblies, airframe structures, and control systems. Unlike nuts that rely on nylon inserts for their locking feature, the MS16625 achieves its prevailing torque through a precisely deformed thread or an elliptical collar, ensuring consistent locking performance even in high-temperature environments where nylon could degrade. Its primary role is to provide a robust, vibration-resistant connection, crucial for the long-term integrity and safety of aircraft components.
Specifications
- Type: Self-locking, all-metal, prevailing torque hex nut.
- Material: Typically manufactured from high-strength steel or Corrosion-Resistant
AI disclosure: this product description and its specifications were generated with AI assistance from the manufacturer's Illustrated Parts Catalog.
- Stock: Out of Stock
- Manufacturer Part #: MS16625
- Part#: MS16625
Aircraft Fitment Finder
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
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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.
