Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T00421-5083 found under Enhanced Production by Hdt Expeditionary Systems Inc. The National Stock Number assigned to this part is 4610016309684, 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 T00421-5083.