Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1515L5L found under Insulator Washer by National Aerospace Standards. The National Stock Number assigned to this part is 5970005556406, and the Federal Supply Class is 5970 Electrical Insulators And Insulating Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NAS1515L5L.