DIN ISO 9634:1996-01

The document defines the configuration and specifies the dimensions of various types of plastic caps and plugs used for the protection, during transit and storage, of openings in aerospace fluid system components (smooth or threaded ports in accessories, ends of pipes or hoses, pipe fittings, and port connections). The caps and plugs provide protection for threads and sealing surfaces and prevent the ingress of foreign matter (for example dust, etc.) into the openings.