Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A12034B5 ITEM-2 found under O Ring by Ian Conrad Bergan Inc. The National Stock Number assigned to this part is 5331014407267, 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 A12034B5 ITEM-2.