HDC kits are standardized kits for assembling complete plug-in connectors. The HDC kits normally consist of a male insert, a female insert, a plug housing, a bulkhead housing and a cable gland. Weidm?ller offers a range of standard connector combinations with metric or PG cable entry threads. The PUSH IN connection is a direct-insert method of connection. The preprocessed wire can be inserted directly into the wire connection without the need for any tools.