Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 205-80MM PN12 found under O Ring by R T Valvole Industriali Srl. The National Stock Number assigned to this part is 5331151452029, 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 205-80MM PN12.