Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U4M931151X found under Microcircuit Digita by Fairchild Semiconductor Corp. The National Stock Number assigned to this part is 5962010649590, 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 U4M931151X.