Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W1FW990B1R found under Connector Plug Electrical by Williams Pyro Inc. The National Stock Number assigned to this part is 5935004996169, 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 W1FW990B1R.