@ph.silva1 i am just another user, but perhaps you can look into get.prims or get.mesh to isolate the material randomization as mentioned by the mod/dev from a while back. i’ve also provided links to the latest API for replicator:
without knowing what the screw USDs are set up, but if they simply contain an xform and one child prim (the screw mesh), another possibility could be to remove the xform and set the mesh to be the default prim at the top of hierarchy stack.