On the 250 series P.F. cars, such as the Coupes, Cabriolets and the GTEs, the electrical panels are mounted in the engine compartment and are protected from the elements by a black wrinkle-finished aluminum panel. These covers are held in place with three small knobs. These knobs are machined from brass bar stock and nicely finished in chrome. 250 P.F. Electrical Panel Knobs.
This type of nuts were used on all of the outside-plug 250s from the time of the introduction of the GTEs through the last of the 250 Lussos. The 275 series cars changed to the flat, round, knurled nuts. Three-ear air cleaner nuts.
From the very early days Ferrari and the other Italian manufacturers used the strap or Copiglia type hose clamps. These were available in 5 or 9mm widths. Until the mid – 1960s the clamps and straps were plated with cadmium, often called Silver Cad or Cad 1. Cadmium plating is rarely seen in the U.S. becasue of the difficulty in disposing of hte plating by products. These components are all freshly plated with the correct silver Cad 1 finish. 5mm clamp and strap for the radiator overflow, steam tubes on the inside plug cars and the heater hoses on the 275s