Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1SW8SD found under Shaft Transmission Pump by American Gage And Machine Co. The National Stock Number assigned to this part is 4320008972453, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1SW8SD.