The 1011-257-0205 is a Receptacle Backshell made of nylon 6.6 (polyamide 6.6). It is designed to snap onto and mates with all standard (basic plug and receptacles without modifications) DT series connectors. The rigid durable backshell offer a high level of protection and allow convoluted tubing to nest within the rear of the backshell. The backshell is available for both standard plugs and standard receptacles. Since it is designed to work with the standard DT connectors, tests should be conducted for fit and function of a backshell being used on any part with a modification.