MS21061-06 Self-Locking Nut Plate is a military standard aircraft fastening component designed to provide a permanent, self-locking threaded attachment point for aerospace structures and assemblies. It is commonly used in locations where access to the back side of the structure is restricted, allowing fasteners to be installed and removed from one side while maintaining secure thread engagement.

Manufactured in accordance with the MS21061 specification, this nut plate incorporates a prevailing torque self-locking feature that helps prevent screws from loosening under vibration, shock, and cyclic loading. The locking element ensures consistent fastener retention without the need for additional locking devices, making it suitable for demanding aviation applications.

MS21061 series self-locking nut plates are widely installed in aircraft fuselage structures, wing assemblies, engine nacelles, avionics compartments, interior panels, and access covers. Their compact, permanently mounted design simplifies maintenance procedures, reduces installation time, and provides a durable fastening solution for components requiring periodic removal and reinstallation.

Routine inspections should verify that the nut plate remains securely attached to the structure, the threads are undamaged, and the self-locking feature continues to provide adequate prevailing torque. Replacement is recommended if excessive wear, corrosion, or loss of locking capability is detected.

Key Features

- Part Number: MS21061-06
- Manufacturer: Military Standard (MS) / Approved Aviation Hardware Manufacturer
- Component: Self-Locking Nut Plate
- Self-locking prevailing torque design for vibration-resistant fastening
- Provides a permanent threaded attachment point in aircraft structures
- Designed for one-sided fastener installation and simplified maintenance
- Manufactured to MS21061 military specification
- Suitable for airframe, avionics, engine, access panel, and structural aircraft applications