Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TP25-1890 found under Gage Plug Plain Cylindrical by Deltronic Corporation. The National Stock Number assigned to this part is 5220011976805, and the Federal Supply Class is 5220 Inspection Gages And Precision Layout Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TP25-1890.