Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 040.677.4 PC 412 found under O Ring by Heinrich Behrens Pumpenfabrik Gmbh. The National Stock Number assigned to this part is 5331123223210, 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 040.677.4 PC 412.