Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D1U001 ITEM 20 found under Nut Sleeve by Eaton Aerospace Ltd. The National Stock Number assigned to this part is 5310013240478, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D1U001 ITEM 20.