Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25979 1 found under Cap Air Valve Actua by Alliedsignal Inc. The National Stock Number assigned to this part is 1680003481047, 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 25979 1.