Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 805 009 99B found under Parts Kit Ball Valv by Perko Inc. The National Stock Number assigned to this part is 4820015180097, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 805 009 99B.