Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 555-5549 found under Connector Receptacl by Northern Telecom Systems Corp. The National Stock Number assigned to this part is 5935008390728, 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 555-5549.