Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A3 02003-03 found under Spacer by Harding Safety Usa Inc. The National Stock Number assigned to this part is 5365012846615, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A3 02003-03.