Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MT-12 24-R-ULC found under Bell And Buzzer Electrical by Siemens Industry Inc. The National Stock Number assigned to this part is 6350014601158, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MT-12 24-R-ULC.