Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28163-1 found under Valve Metering by Hexco International. The National Stock Number assigned to this part is 4220004673289, and the Federal Supply Class is 4220 Marine Lifesaving And Diving Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 28163-1.