Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20427 found under Filter Body Water Purification by Barnstead Thermolyne Corporation. The National Stock Number assigned to this part is 4610014219349, 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 20427.