Abstract: A sensor window compliant mounting assembly (42), such as used in a missile (20) to protect a sensor (40), has a truncated hemispherical sensor dome window (52) and a dome mount housing (60). The dome mount housing (60) includes a hollow tube (62) with an opening (64), an internal circumferential thread (66) adjacent to the opening (64), and an integral bezel retainer ring (68) extending circumferentially around the opening (64). The bezel retainer ring (68) engages and retains the exterior surface (56) of the dome base (54). A spanner nut (72) is threadably engaged to the internal circumferential thread (66) of the dome mount housing (60), and a partially compressed fiber metal washer (74) reacts between the spanner nut (72) and the lower surface (58) of the dome base (54) to bias the sensor dome window (52) toward the bezel retainer ring (68).