Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18KP398 found under Test Plug Closed by Oshkosh Corporation. The National Stock Number assigned to this part is 5220015722356, 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 18KP398.