Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 50.01.01-350MM ITEM 3 found under O Ring by Naf Ab. The National Stock Number assigned to this part is 5331014261276, 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 50.01.01-350MM ITEM 3.