Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42R2049-305 found under Ring Retaining by Navair And Navsea Managed. The National Stock Number assigned to this part is 5325002827149, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 42R2049-305.