Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18T-FS2 ITEM 9 1.50IPS found under O Ring by Newmans Inc. The National Stock Number assigned to this part is 5331014175440, 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 18T-FS2 ITEM 9 1.50IPS.