General
Norm	DIN 46319
Thread	M40
Material	Polystyrene
Colour	Light grey
Colour code	RAL 7035
Thread specification	IEC 423

The 116 M40 LGR PS nut from OBO Bettermann is a component for the secure fastening of screw connections in electrical installations. It is particularly used in cable glands and protective conduits, where a stable and durable connection is required. The product is standardized according to DIN 46319 and features a metric thread in accordance with IEC 423, ensuring compatibility with standardized installation systems. The nut is made of polystyrene and is available in light grey (RAL 7035), making it visually integrable in many installation environments.

Nut is the central term for this component, which, in combination with a screw and a threaded hole, generates the necessary tension for a secure connection. The designation M40 refers to the thread diameter, which is relevant for compatibility with corresponding screws and threaded holes. The LGR PS version indicates the light grey colour (LGR) and the material polystyrene (PS), known for its hard, impact-resistant structure and good electrical insulation properties.

Applications include primarily electrical installations, where nuts are used for the secure fastening of cable glands, protective conduits, or other threaded connections. They are suitable for indoor and outdoor use, provided mechanical and thermal loads remain within specified limits. Use in cable glands ensures a secure and durable connection that is resistant to vibrations and mechanical stress.

Functions and features in detail include precise compatibility with the metric M40 thread, guaranteed by standardization according to IEC 423. The nut is used in conjunction with a screw and a threaded hole to create a firm connection. Due to the polystyrene material, special caution is required when tightening, as there is a risk of stress cracking. Therefore, only a moderate tightening torque is recommended to avoid material fractures.

Technology explained simply means that the nut acts as a passive component enabling force transmission from the screw to the component being fastened. The polystyrene material provides high electrical insulation, which is advantageous in electrical installations. The light grey colour (RAL 7035) serves visual identification and integration into standardized colour schemes. Standardization according to DIN 46319 and IEC 423 ensures interoperability with other components on the market.

Compatibility and accessories refer to use with screws and threaded holes in M40 format. The nut is designed for use in cable glands and protective conduits, which are also manufactured according to DIN 46319 or comparable standards.

Installation and mounting require attaching the nut to the inner side of the component being fastened, with the screw being drawn through the thread. Mounting is done using a suitable screwdriver or electric screwdriver, with tightening torque limited to moderate levels as recommended for polystyrene to avoid material breakage. Correct installation ensures a durable and secure connection.

Operational advantages include the high mechanical stability of the connection, electrical insulation provided by the polystyrene material, and standard compliance, which ensures interoperability with other components. The light grey colour enables visual inspection and integration into standardized colour schemes. Use in cable glands and protective conduits ensures secure and durable fastening, even under mechanical stress.