Abstract: A non-metallic acoustic and thermal isolating fastener mount comprising a housing 20, a threaded locking plate 30, an elastic diaphragm 40, and an unthreaded spacer 50 is disclosed. The housing 20 includes a cavity 24 and a pair of outwardly extending arms 22. Mounted in the cavity 24 is the treaded locking plate 30. The treaded locking plate 30 is positioned such that a pair of posts 34 lie between a pair of outwardly extending arms 29 of an access opening 26 formed in the top of the housing 20. The elastic diaphragm surrounds the access opening and includes apertures through which a threaded hub 32 and the posts 34 extend. The unthreaded spacer 50 includes a hub having outer diameter that allows it to be press-fit around the hub 32 of the threaded locking plate 30. The housing 20, threaded locking plate 30, and spacer 50 are formed of a high-strength, high-temperature plastic, preferably a fiber reinforced polyamide-imide resin, such as Torlon.TM..