ISO 10511 is the international standard for Prevailing Torque Type Hexagon Thin Nuts with Non-Metallic Inserts (commonly known as Nyloc thin nuts). Within the GFM-WCR System, ISO 10511 serves as a low-profile vibration-resistant solution, specifically engineered for applications with limited space where a standard bolt or screw joint must remain secure without the need for additional locking washers.

Unlike the decorative encapsulation provided by the domed DIN 1587 or ASME B18.6.6, ISO 10511 focuses on mechanical anti-loosening. The non-metallic insert creates an interference fit with the screw threads, maintaining a constant prevailing torque that prevents the nut from backing off even if the initial axial tension is lost. This thin-profile geometry is essential for compact mechanical assemblies where traditional high-profile locking nuts would interfere with surrounding components.

The technical focus of ISO 10511 is Frictional Interference and Space Optimization. While DIN 1587 and ASME B18.6.6 offer external protection, ISO 10511 provides internal locking. The thin design ($m$ height) is optimized for joints where the bolt is primarily under shear or where only a few threads of the screw protrude. In the GFM-WCR framework, this ensures that terminal connections in aerospace, electronics, and precision robotics remain aesthetically clean while being structurally immobile under vibration.