The COLLAR-RCS370B is a cylindrical collar component designed for LED panel mounting and environmental sealing applications. It features a 3/8" O-ring seal and a nominal outer diameter of 0.300 inches, with dimensional tolerances of ±0.010 inches for three-decimal places and ±0.025 inches for two-decimal places per ANSI-Y14.5 standards. The collar is manufactured by Ledtronics and is commonly used in LED indicator assemblies to provide a secure, sealed interface between the LED lens and the panel cutout, ensuring protection against dust and moisture ingress in electronic equipment and control panels.