Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4F51239-101A found under Seal Nonmetallic Sp by Aero Fab Sales. The National Stock Number assigned to this part is 5330008604066, 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 4F51239-101A.