Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RF5-CBY found under Receptacle Turnlock Fastener by Hamilton Sundstrand Corporation. The National Stock Number assigned to this part is 5325006021230, 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 RF5-CBY.