Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XC5057R found under Light Emitting Diode by Xciton Corp. The National Stock Number assigned to this part is 5980011913834, and the Federal Supply Class is 5980 Optoelectrical Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like XC5057R.