Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S18981A found under Holder Electrical Contact Brush by Chicago Pneumatic Tool Co. The National Stock Number assigned to this part is 5977002544407, 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 S18981A.