The LN29671AM4 is a DIN LN-series aerospace fixed plate nut (nutplate / anchor nut) used to provide a permanently installed threaded fastening point in aircraft and helicopter structures. It is designed for M4 × 0.7 metric screws, allowing repeated assembly and disassembly without damaging the parent structure.

This type of nutplate is riveted or otherwise permanently attached to a structural panel or bracket. Unlike floating versions, the fixed design does not allow lateral movement of the threaded nut, ensuring precise alignment and stable fastening in applications where positioning is controlled and repeatability is important.

LN29671 series nutplates are widely used in European aerospace applications (including helicopter airframes such as Airbus Helicopters structures) and are part of standardized aviation hardware families used across airframe assemblies, access panels, and interior/exterior mounting points.

The component is manufactured from corrosion-resistant aerospace-grade steel alloy, designed to withstand vibration, environmental exposure, and repeated torque cycles typical in aircraft maintenance and operation.

Key features include:

Part number: LN29671AM4
Type: Fixed plate nut / anchor nut (nutplate)
Thread size: M4 × 0.7 metric
Aerospace DIN LN standard component
Permanently installed (riveted mounting)
Fixed design (non-floating nut element)
Provides reusable threaded insert in airframe structure
High vibration resistance for aircraft applications
Corrosion-resistant steel construction
Used in helicopter and aircraft structural assemblies
Suitable for panels, covers, and airframe fittings
Standard aerospace maintenance hardware component