Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 03T177-135 found under Spacer Ring by Falls Filtration Technologies In. The National Stock Number assigned to this part is 5365005967871, 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 03T177-135.