Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5 036 03 009 001 PC. NO. 19 found under O Ring by Itt Corporation. The National Stock Number assigned to this part is 5331015939765, 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 5 036 03 009 001 PC. NO. 19.