The DB-59-20BA is a polyethylene dust cap for protecting D-Subminiature socket connectors. As a black antistatic component, it has a surface resistivity of less than 1x10^5 ohm/sq and meets the static decay test requirements of MIL-B-81705C, Type II. The cap features an integral flange for easy application and removal, with an outer dimension (A) of 42.42 mm. It is designed to shield unused I/O ports from moisture and dust, ensuring connector integrity in various applications.