Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 173 38566 1 found under Thrust Ring Swivel by Communications And Power Industries. The National Stock Number assigned to this part is 2590012312623, and the Federal Supply Class is 2590 Miscellaneous Vehicular Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 173 38566 1.