Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 674987-1 found under Switch Thermostatic by Viasys Respiratory Care Inc. The National Stock Number assigned to this part is 5930008152109, 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 674987-1.