Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12275889 found under Insulation Pipe Fitting Covering by Thermal Structures Inc. The National Stock Number assigned to this part is 5640011461898, and the Federal Supply Class is 5640 Wallboard Building Paper And Thermal Insulation Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12275889.