Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SQR12X12X12 found under Adapter Air Conditioning Heating by United Mcgill Corp. The National Stock Number assigned to this part is 4520010295166, 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 SQR12X12X12.