Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 44-00-01 ITEM 3 found under O Ring by Huntington Ingalls Incorporated. The National Stock Number assigned to this part is 5331013311135, 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 44-00-01 ITEM 3.