Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2215B-018 ITEM 58 found under O Ring by Cs Controls Incorporated. The National Stock Number assigned to this part is 5331015222432, 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 2215B-018 ITEM 58.