Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL-K10053621 ITEM 0019 found under Light Emitting Diod by L3 Communications Corp. The National Stock Number assigned to this part is 5980016179722, 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 PL-K10053621 ITEM 0019.