4240-00-300-6980 (S9300F921869PC63)
4240-00-300-6980 is equivalent to manufacture part number 17554. It is a breathing tu insert and is classified under Federal Supply Class 4240 (4240 - Safety and Rescue Equipment), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 4240 - Safety and Rescue Equipment and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.