The LN29671AM5 is a fixed aircraft plate nut (anchor nut) used in airframe assemblies to provide a permanently installed threaded fastening point. It is part of the LN (Luftfahrt Norm / aerospace standard) series, commonly used by Airbus Helicopters and related European airframe manufacturers.

This component is designed for M5 × 0.8 metric screws, allowing repeated assembly and disassembly without damaging the structure. The nut is typically riveted or fastened to a structural bracket or skin panel, where it remains permanently installed and provides a captive threaded receptacle.

Unlike floating nutplates, this version is a fixed type, meaning the threaded element does not move laterally, which provides higher positional stability and alignment accuracy in airframe assemblies. It is commonly used in helicopter and light aircraft structures, including panels, covers, and interior/exterior airframe fittings.

The part is made from corrosion-resistant aerospace-grade steel alloy, designed to withstand vibration, environmental exposure, and repeated torque cycles.

Key features include:

Part number: LN29671AM5
Type: Fixed plate nut / anchor nut
Thread size: M5 × 0.8 metric
Aerospace LN-standard airframe fastener
Permanently installed (riveted or mounted)
Provides reusable threaded insert in structure
High vibration resistance design
Corrosion-resistant steel construction
Used in helicopter and aircraft airframe assemblies
Suitable for panels, covers, and structural fittings
Prevents wear on primary structure threads
Standard aviation maintenance hardware component