Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3131 found under Regulator Voltage by N H Researchincorporated. The National Stock Number assigned to this part is 6110001614115, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3131.