Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 91221-343 found under Connector Receptacl by Interstate Electronics Inc. The National Stock Number assigned to this part is 5935004709415, and the Federal Supply Class is 5935 Connectors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 91221-343.