Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1237D found under Motor Hydraulic Boo by Dudco Products Co. The National Stock Number assigned to this part is 2520003377493, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1237D.