Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 17M42-2073 found under Ring Guide by Carrier Machinery And Systems Div Of. The National Stock Number assigned to this part is 5365005378110, 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 17M42-2073.