Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13F-CB4-5IN ITEM 10 found under O Ring by Newmans Inc. The National Stock Number assigned to this part is 5331013335190, 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 13F-CB4-5IN ITEM 10.