Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C51728 found under Ring Electrical Con by Mutron Corp. The National Stock Number assigned to this part is 5977006954729, and the Federal Supply Class is 5977 Electrical Contact Brushes And Electrodes. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C51728.