With a quantity of two pieces, the Bolt-wash.,6x16 is the most used part in the F-13 diagram.
The most reasonably priced component used on the Nps50 Zoomer 2005 (5) Japan Af58-140 F-13 is the Bolt-wash.,6x16.
four components are listed in the schematic for this Nps50 Zoomer 2005 (5) Japan Af58-140 F-13 .