The 10-580902-182 is a receptacle protection cap designed for Amphenol GT Series reverse bayonet coupling connectors used in Bombardier transportation applications. This protective metal cap seals the front of receptacles and includes a retention chain to keep the cap secured at the required location. The cap is available in multiple shell sizes (11 through 40) with dimensions specified in both inches and millimeters, featuring a maximum length of 0.700 inches (17.8 mm) for smaller sizes and 0.900 inches (22.9 mm) for larger sizes. The cap design provides environmental protection for unused or disconnected receptacles, preventing contamination and damage to connector contacts. These caps are essential accessories for maintaining connector integrity during storage, transport, and field operations in demanding transportation environments.