Hello Dave, The same has Mel stated, my MIL-P-13949 is out of reach at the moment, sorry. However, IPC 4101 on page 19, has a list of SPEC. SHEETS, and a cross reference ( to some extent) therefore MIL-P-13949/4 is referenced on these sheets, IPC 4101/21; /24; /25; /26, that is four separate spec sheets. Again sorry I can't be more specific at the moment. A quick guess is this may include a lot or most FR-4's in existence. The range of Tg's, 110 C to 220 C does not exclude many laminates. Caveat emptor, choose wisely and good luck. Sincerely, Paul Holloway; [log in to unmask] <mailto:[log in to unmask]> -----Original Message----- From: Dave Dixon [mailto:[log in to unmask]] Sent: Monday, August 25, 2003 3:20 PM To: [log in to unmask] Subject: [TN] Mil Spec help Hi Technetters, I am looking for information on board material conforming to MIL-P-13949/4 Type GFN. I searched for this spec. at assist.daps.dla.mil without success. Any clues would be appreciated on where to find this spec. Thanks in advance. Dave Dave Dixon Engineering Technician Aero-Mach Labs Inc. --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------