Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 39-9966 found under Press Connector Pin Assembly by Racal Instruments Wireless Solutions. The National Stock Number assigned to this part is 5120001168191, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 39-9966.