Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 646728-001 found under Holder Fitting Fire Fighting Equ by Eone Inc. The National Stock Number assigned to this part is 4210015347606, and the Federal Supply Class is 4210 Firefighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 646728-001.