an improved shock isolating mount is provided that permits selection of either a high or a low separation strength . the shock mount comprises interfitting flanged spacer and thimble members and resilient rings mounted thereto . the thimble is formed from a hollow plastic stem and a metal base . the metal base includes a flange and an internally threaded post . the thimble stem fits over and snaps onto the post . the metal base member is made in either a high strength or low strength configuration . selection of the appropriate configuration of base member provides a shock mount assembly of the desired separation strength .