Helix rod for piston filler

Manufactured from black delrin plastic, this rod has a circular cross section which has the merit of being a stronger alternative to the injection moulded version which had a reduced oval cross section

It uses the same end design and is fully compatible with both the 146 and 149 pens.

As with all pen repairs some knowledge of fitting spare parts is desirable.

Please follow the links below for a comprehensive description of this part from a renowned repairer of M.B pens. I think they are quite interesting.

http://www.fountainpennetwork.com/forum/index.php/topic/255063-modern-montblancs-weak-piston-lead-screw/

http://www.fountainpennetwork.com/forum/topic/276873-another-d-i-y-149-repair-pictorial/