The Pipistrel 5011022 is a M14 hex self-locking nut (Polystop type) used in aircraft structural assemblies where a high-strength, vibration-resistant threaded connection is required.

It features a Polystop locking mechanism, typically an integrated polymer (nylon-type) insert or prevailing-torque locking zone, which increases friction on the bolt threads and prevents loosening under vibration and cyclic loads. This makes it suitable for landing gear and heavily loaded airframe structures, where joint security is critical.

In Pipistrel aircraft applications, this nut is commonly used in landing gear assemblies and primary structural connections, where it works together with bolts, washers, and bushings to maintain alignment and structural integrity under repeated load cycles.

Compared to standard nuts, the self-locking design eliminates the need for additional locking devices in many installations and improves maintenance reliability in high-vibration environments.

Key features include:

Pipistrel part number: 5011022
Type: Hex self-locking nut (Polystop)
Thread size: M14 metric
Vibration-resistant locking design
Used in landing gear and structural aircraft assemblies
Prevents loosening under cyclic loading
Aerospace-grade fastener for light aircraft structures
Suitable for composite and metal airframe interfaces
High torque retention performance
Corrosion-resistant construction
Standard aviation maintenance hardware
Common in Pipistrel landing gear installations