Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1019 ITEM 420.1 found under O Ring by Heinrich Behrens Pumpenfabrik Gmbh. The National Stock Number assigned to this part is 5331013528257, 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 1019 ITEM 420.1.