Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 05-191-653MK023 found under Brush Electrical Contact by Allis Chalmers Corp. The National Stock Number assigned to this part is 5977001072844, 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 05-191-653MK023.