Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P64-005700-043 found under Microcircuit Digital by Pultz John M Co Inc. The National Stock Number assigned to this part is 5962001027520, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like P64-005700-043.