Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2TMT28-4A-Y found under Switch Sensitive by Campk Components. The National Stock Number assigned to this part is 5930011739068, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2TMT28-4A-Y.