The most reasonably priced component used on the Nc50 Express 1981 (b) Usa Frame / Seat - Chart is the Screw,tap.5x12.
The Frame / Seat - Chart assembly is constructed from several parts from which the Frame *pb31* is the most expensive.
This Frame / Seat - Chart diagram displays the required parts for the Nc50 Express 1981 (b) Usa Frame / Seat - Chart.