Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D1-061-0945 found under Valve Check by Chemetron Fire Systems. The National Stock Number assigned to this part is 4820015142244, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D1-061-0945.