These 5mm (.8mm pitch) nylock nuts are just the thing to make your 48 IDA carbs look like new. We’ve had them gold zinc plated to look just like the original Weber nuts. Some folks with the more modern IDA’s that have screws instead of nuts and studs will use these nuts to convert their carbs to “old school look” like the original Italian produced carbs. The nuts have a socket size of 8mm. Set of twenty.