What is BS EN 4531-201- Optical contact for EN 4641 singlemode cable -55 °C to 125 °C about?  
This standard defines the performance and dimensions of optical PC profiled contact for singlemode 9 micrometres/125 micrometres fibre and (1,8 ± 0,1) mm diameter cable.
BS EN 4531-201 covers the terms and definitions, required characteristics, description, polarization, rear accessories, tooling, cleaning instructions, designation, and technical specifications of circular optical connectors, coupled by a triple start threaded ring.
BS EN 4531-201 has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN).
Who is BS EN 4531-201- Optical contact for EN 4641 singlemode cable -55 °C to 125 °C for? 
BS EN 4531-201 on electrical connectors for EN 4641 singlemode cable -55 °C to 125 °C is useful for:
- Spacecraft and space products manufacturers  
- Aerospace and defence industries   
- Testing agencies involved in the inspection of spacecraft and aerospace products  
- Quality control personnel for spacecraft products  
Why should you use BS EN 4531-201- Optical contact for EN 4641 singlemode cable -55 °C to 125 °C?  
The guidelines given in BS EN 4531-201 helps to select the right connector as connectors improve the production process if an electronic component fails, the failed component can be replaced when an electrical connector is installed.
The guidelines provided in BS EN 4531-201 helps the design engineer with the use of electrical connectors to have greater flexibility while designing and integrating new products with components as well. BS EN 4531-201 helps design engineers in designing electrical connectors as per specifications that enhances the reliability of their products.
BS EN 4531-201 creates a standardized approach for manufacturers of electrical connectors if they supply their metallic materials to the aerospace industry.
BS EN 4531-201 is structured such that the necessary level of quality is achieved, consistently maintained, and the high reliability of the product assured. By adopting BS EN 4531-201, manufacturers can demonstrate the reliability of their products and build trust in their use throughout the aerospace supply chain.
