45 u00b0 with regard to its position in fig4 to better illustrate its operation as can be seen radial flexure members 20 and 22 are biased towards screw 10 by springs 24 so that the flanks of the internal threads thereon make good contact with the flanks of the external thread on screw 10 because flexure members 20 and 22 have a free floating end and a certain degree of flexibility good contact is always maintained despite inconsistencies in the external thread on screw 10 this serves to eliminate binding and resulting erratic torque response due to such inconsistencies while three oppositely directed flexural members have been illustrated in the figures it is clear that there can be more or less the minimum number of course is two since there must be one extending in each longitudinal direction the length in both the longitudinal and radial directions are determined by factors while relate to the ultimate application it is usually preferred however to design these oppositely directed longitudinal flexure members to minimize rotational moments anti backlash nut 12 can be fabricated from a wide variety of materials including many metals and polymeric compositions a preferred material is a polymeric composition which has low friction and is self lubricating the flexure members can be molded into the nut or the nut can be molded as a solid tubular member in which case flexures can be provided by milling slots in an appropriate configuration into the tubular body similarly the nut can be molded with internal threads using traditional molding procedures or the nut can be molded without internal threads which are then subsequently provided by chasing or tapping the cylinrical bore those skilled in the art will recognize or be able to ascertain using.