Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MR50D1 found under Motor Pneumatic by Cooper Industries Inc. The National Stock Number assigned to this part is 2895001049038, and the Federal Supply Class is 2895 Miscellaneous Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MR50D1.