Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0103721-00 found under Box Connector Elect by Duffnorton Co Inc. The National Stock Number assigned to this part is 5975002969437, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 0103721-00.