Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D53 1 2VALVE 4860 found under Valve Diaphragm Sto by Imi Cash Valve Inc. The National Stock Number assigned to this part is 4820013920351, 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 D53 1 2VALVE 4860.