Small bag of parts included with scale trains 4785 covered hopper

[csxns]

stokesda

included with my crude oil tank cars from last year or so.

No, mine does not have them but they sent me one because one was missing.

[stokesda]

Yes, they are extra roller bearing caps. ScaleTrains also included them in the boxes with my Gunderson covered hoppers, as well. Must be a fairly recent thing, I don't recall them being included with my crude oil tank cars from last year or so.

[MARTIN STATION]

   I believe they are replacement roller bearing caps for the outside of the axles on the trucks. My HO SD40-3 came with those also. Really nice of Scale Trains to include those.  

Ralph

[dh28473]

They are very tiny round parts 4 in total any idea what for? It's the rivet counter.