Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5189457 found under Holder Demineralize by Raytheon Company. The National Stock Number assigned to this part is 4610011761126, and the Federal Supply Class is 4610 Water Purification Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5189457.