Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 19-660-315-00-040 found under O Ring by Siemens Power Corp. The National Stock Number assigned to this part is 5331001733093, 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 19-660-315-00-040.