Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21000T71-1 found under Gage Special by A Vox Systems Inc. The National Stock Number assigned to this part is 5220004350077, and the Federal Supply Class is 5220 Inspection Gages And Precision Layout Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21000T71-1.