Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NN72H4-99 found under Plug Nipple Assembl by Transdigm Inc. The National Stock Number assigned to this part is 1680010427950, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NN72H4-99.