Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2-1 2"D-6T-1-1 2TT-42 found under Cooler Fluid Industrial by The Walter Machine Co Inc. The National Stock Number assigned to this part is 4420014493869, 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 2-1 2"D-6T-1-1 2TT-42.