Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645-0052 found under Switch Thermostatic by Meggitt Troy Inc. The National Stock Number assigned to this part is 5930000678031, 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 645-0052.