Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 11-830B1 found under Insulator Plate by Treadwell Corporation. The National Stock Number assigned to this part is 5970007967139, 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 11-830B1.