Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AD0173-02 found under Custom Fit Protecti by Crew Systems Corporation. The National Stock Number assigned to this part is 4240016015522, and the Federal Supply Class is 4240 Safety And Rescue Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AD0173-02.