Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HO4X4-50-1250-C found under Meter Flow Rate Indicating by Hoffer Flow Controls Inc. The National Stock Number assigned to this part is 6680015187356, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HO4X4-50-1250-C.