Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1805 42 3780X-180 found under Element Thermostat by Grove R B Inc. The National Stock Number assigned to this part is 6620011291260, and the Federal Supply Class is 6620 Engine Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1805 42 3780X-180.