Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 10990 27 250 PART NO 4 found under Packing Preformed by Hamworthy Kse Ab. The National Stock Number assigned to this part is 5330014282351, 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 10990 27 250 PART NO 4.