Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D2239 found under Nut Plain Slotted H by American Standard Inc. The National Stock Number assigned to this part is 5310001995300, 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 D2239.