We keep a small quantity of type 076 nibs in stock, which are size 5 but are slightly wider across the shoulder than type 180. They fit into many commercially available pens, notably including Visconti.
They are not available in a kit compatible housing but the geometry and thread of the Bock housing is identical to type 180, therefore makers of kitless pens are able to use the same thread taps if they wish to make a pen with a more substantial appearance than a standard type 180 size 5 nib.
