Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number JT 16.90X2.70-20B8 found under O Ring by Societe Technique Armoricaine. The National Stock Number assigned to this part is 5331142506917, 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 JT 16.90X2.70-20B8.