Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7899-25A4 found under Slide Port Aft by Chief Of Engineers. The National Stock Number assigned to this part is 5420000116240, and the Federal Supply Class is 5420 Bridges Fixed And Floating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7899-25A4.