This screw holds the idle jet in place on dual-throat Weber 46 IDA or 48 IDA carburetors. Note that the 3-barrel IDA (Ferrari, Porsche 911) uses a different holder. Sold individually, 2 required per carburetor.
The Weber IDA Idle Jet (Part No. 74823-Size) is sold separately.
Note: Fits genuine Weber (made in Italy or made in Spain) carburetors only! Does not fit most copies, Asian knock-offs, or work-alikes.