Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2420021-1 found under Pin Piston by Coltec Industries Inc. The National Stock Number assigned to this part is 2815006496560, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2420021-1.