Ferrari used these button-type grease fittings from the very earliest cars until the 275’s. During the production of the 250 series cars some of the pieces purchased from outside suppliers used the normal snap-on type. The sealed tie rod ends are a good example showing that a lot of the later cars used both types of grease fittings. The button type grease fittings were made of brass and plated with a very thin layer of nickel. The nickel finish quickly wore off due to dust and dirt on the road plus the factory recommended 2,500 mile lubrication schedule. The button type grease fittings all used the same dimension for the shaft and head but there was a variety of thread sizes. 5 x 0.8mm: these were used on the very early cars such as the 166s. 6×1 mm. 8x1mm: this is the most common size of the 250 series cars. 8×1.25mm: The French always have to be different. Don’t think these were used on Ferraris. 10x1mm: Used on some of the clutch and brake pedal linkage. 11 x 0.75mm: Used on the clutch and brake pedal linkage it is not unusual to see both on the same car. These are all nickel-plated, the shaft size is 12.5mm diameter, 3.5 mm tall, the heads are 15mm across the flats and 2.5mm thick.
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