Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 666231-051 found under Transformer Radio Frequency by R And N Invesment Properties Lc. The National Stock Number assigned to this part is 5950007242330, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 666231-051.