Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SDD-16019 PIECE 021 found under O Ring by Siemens Demag Delaval Turbomachi. The National Stock Number assigned to this part is 5331012998214, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SDD-16019 PIECE 021.