Elastomeric bearing pad with unlike threaded fasteners

In a truck for a railway vehicle including longitudinally spaced wheelsets each including an axle, wheels, and bearings mounted thereon, a pair of laterally spaced side frame each having pedestal jaws depending from a pedestal roof at each end of said sideframe for accommodating said bearing on said axle, a bearing adapter disposed between said pedestal jaws and mounted on said bearings, the improvement comprising:

• an elastomeric device disposed between said bearing adapter and said pedestal roof, said elastomeric device including an elastomeric pad interposed between the opposing surfaces of an upper plate and a lower plate;
• planar surfaces formed on the exposed surfaces of said upper and lower plates, said upper plate planar surface having a central boss projecting upwardly and an internally threaded bore within said boss;
• a first planar surface on said pedestal roof engageable in face-to-face contact with said planar surface of said upper plate, said first planar surface being provided with an opening to receive said boss;
• a second planar surface on said bearing adapter matingly engagable with said planar surface on said lower plate;
• an externally threaded stud projecting from said lower plate for threadably fastening said elastomeric device into a matingly threaded hole in said bearing adapter to hold said planar surface on said lower plate in firm fact-to-face engagement with said second planar surface;
• and an externally threaded bolt means extending through said pedestal roof into contact with said central boss of said upper plate for holding said planar surface on said upper plate in firm fact-to-face engagement with said first planar surface.