This is Atlas Copco part number 3121502200 silencer – SRD20, stocked at Crowder Supply as AC-3121502200. It silences the exhaust pulse. Once it clogs, the tool works against its own back pressure.
Give us the model and serial off your machine and we will confirm the fit; the full diagram library and the Atlas Copco lineup are the other two places to start. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3121502200
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121502200