Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A690N1A found under Insulation Brush Ho by Friends Of The Potomac River. The National Stock Number assigned to this part is 5970012255601, 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 A690N1A.