Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M5NB4-1CSL found under Sander Vertical Spindle by Freeman Manufacturing And Supply. The National Stock Number assigned to this part is 3220001665790, and the Federal Supply Class is 3220 Woodworking Machines. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M5NB4-1CSL.