considered as a succession of three axially extending concentric ring portions of different diameters the reference numeral 78 designates the largest diameter ring portion the reference numeral 80 the next largest and the reference numeral 82 the smallest as can be appreciated from consideration of the drawing figure it is outer ring portion 78 which contains threads 74 for screwing into bore 48 and it is inner ring portion 82 which is disposed closely around piston rod 28 thus the ring portion 80 constitutes an intermediate ring lying radially between the outer and inner ring portions 78 and 82 one end of the intermediate ring portion 80 integrally joins with a corresponding axial end of outer ring portion 78 and the opposite axial end of intermediate ring portion 80 joins with a corresponding axial end of inner ring portion 82 thus in the illustrated embodiment a radially extending joining portion 84 is seen to join rings 78 and 80 and a radially extending joining portion 86 is seen to join rings 80 and 82 with this arrangement the respective joinings of the intermediate ring portion to its immediate outer ring portion and to its inner ring portion take place at alternate axial ends because the compliant housing is made from a material such as nylon it can be machined molded or otherwise manufactured as a unitary part this construction of compliant housing 54 defines two circular slots extending axially into the compliant housing from opposite axial sides at different radii these slots are identified by the reference numerals 88 and 90 with the latter being the slot of smaller radius inner ring portion 82 extends axially away from the compliant housing.