Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 001661-45 found under Button Handle by T And S Brass And Bronze Works Inc. The National Stock Number assigned to this part is 5930016048774, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 001661-45.