Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HV 221 S3 1 POS 15 found under Gasket by Bauer Nilsen A S. The National Stock Number assigned to this part is 5330251502694, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HV 221 S3 1 POS 15.