Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A27-123 found under Ring Back Up by Ortman Fluid Power Quincy Compre. The National Stock Number assigned to this part is 5365008505396, 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 A27-123.