The 250’s and earlier cars used the tubular screw type jacks made by three or more manufacturers. The small tubes in the lower valence panels of the cars were a weak point and these jacks should be kept in the old tool bags and not used as they are likely to damage the cars. These are the chrome-plated plugs for the jack holes on the side of the cars. Jack Hole Plugs…4 per car.
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.
Ferrari used lightweight two-ear wing nuts to retain the top portion of the air cleaner assembly. The two-ear style was used on all of the early cars through the inside plug 250s and on the early outside plug 250s until early in the run of GTEs in 1959. Two-ear cleaner wing nuts.