Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5000-1-CAL found under Calibrator Subassembly by Precision Filtersinc. The National Stock Number assigned to this part is 6625013889376, 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 5000-1-CAL.