Identification of filter NSN

[Wpns 421]

Does someone have access to the DND NSN system as i need help to identify a air filter teh NSN IS 2940 00 884 4691 Filter element intake (air) Mfg 18265 P/N 819996-13206E1253 PIO 18265.
This an air filter and I would like to get an idea on what it could be used on.
I have an old CD listing the NSNs but cannot access the information(codes???)
if someone has an accessable CD I would appreciate a copy. Gilles