Abstract: An apparatus (10) includes a first structure (90, 72) having a seat surface (74) configured to engage and support an inertia weight (70) for inertial movement under the influence of a vehicle crash condition. The apparatus (10) further includes a second structure (92) configured to support the first structure (90) in a vehicle seat belt retractor (14). The first structure (90) has an arcuate array of first orientation teeth (96). The second structure (92) has an arcuate array of second orientation teeth (116). The second orientation teeth (116) are configured to receive the first orientation teeth (96) in meshing engagement in any selected one of a plurality of different circumferential orientations relative to the arcuate array of second orientation teeth (116).