Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 300123-140 found under Nut by Lidgerwood Manufacturing Company. The National Stock Number assigned to this part is 5310002794443, 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 300123-140.