Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R-TBD-2165 found under by Hi Shear Corporation. The National Stock Number assigned to this part is 5831011933117, and the Federal Supply Class is 5831 Intercommunication And Public Address Systems Airborne. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R-TBD-2165.