MS21061-08 Self-Locking Nut Plate is a military standard aircraft fastening component designed to provide a secure, permanently mounted threaded attachment point in aerospace structures. It is widely used where access to the reverse side of an assembly is limited, allowing efficient installation and removal of mating screws while maintaining reliable locking performance.

Manufactured in accordance with the MS21061 specification, this self-locking nut plate incorporates a prevailing torque locking feature that resists fastener loosening caused by vibration, cyclic loading, and operational stresses. Its compact design makes it suitable for installation in airframe structures, access panels, avionics installations, engine nacelles, and other aircraft assemblies requiring dependable threaded retention.

Self-locking nut plates simplify maintenance procedures by eliminating the need for a separate wrench or backup tool during fastener installation. They are commonly riveted or otherwise permanently attached to the structure, providing a durable and reusable fastening solution while helping reduce maintenance time and improving accessibility in confined spaces.

Routine inspections should verify that the nut plate remains securely attached, free from corrosion or physical damage, and that the self-locking feature continues to provide the specified prevailing torque. Replacement is recommended if the locking capability or structural integrity is compromised.

Key Features

- Part Number: MS21061-08
- Manufacturer: Military Standard (MS) / Approved Aviation Hardware Manufacturer
- Component: Self-Locking Nut Plate
- Provides a permanent threaded attachment point for aircraft assemblies
- Self-locking design resists loosening caused by vibration and dynamic loads
- Commonly installed on airframes, access panels, avionics bays, and engine installations
- Supports efficient maintenance by allowing one-sided fastener installation and removal
- Manufactured to MS21061 military specification