Self-locking nut, used on various locations of the top cover of the Weber IDA Dual-Barrel carburetor.
Use to the secure the top cover itself, the trumpet tabs and the jet cover gauze.
Required quantity per carburetor: depending on your set-up
This is item numbers 60, 61 and 62 in the drawing of the Weber IDA 2C carburetor.
Weber Part Number: 34725.003