The Fs1p 1975 Holland Type 378 Flasher Lamp (optional Parts) consists of seventeen pieces with the Front Flasher Lamp Assy being the most expensive.
The seventeen Fs1p 1975 Holland Type 378 Flasher Lamp (optional Parts) component parts are all listed in this schematic.
On this parts fiche the Screw, Lens Fitting (3x25) is the most specified component.