The 202102 is a RF coaxial Dust Cap with chain for use with N/UHF type RF coaxial female connectors. Brass body with white bronze finish and PTFE insulator construction. The Connex N connectors with screw coupling are fully interchangeable with N connectors made to the MIL-C-39012 specification. Designed for use in all systems where very good RF and mechanical performance is critical, whether it be at low or high frequencies.