Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SRHSD 12 IN X 120 IN found under Pipe Air Conditioning Heating by United Mcgill Corp. The National Stock Number assigned to this part is 4520010297954, 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 SRHSD 12 IN X 120 IN.