The 140-1474 is a blue cylindrical lens cap designed for FMI optical component protection. It features a short cylindrical plastic construction with a dark translucent lens style, providing both protection and light filtering capabilities. The cap is sized at 15/=2 with a matching mounting hole size of 15/=2, ensuring precise fit and compatibility with standard FMI component housings. This RoHS-compliant cap is commonly used in optoelectronic assemblies where temporary lens protection and controlled light transmission are required during storage, handling, or operational scenarios.