Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A-A-1689 TY1CL2 found under Tape Pressure Sensi by General Services Administration Inc. The National Stock Number assigned to this part is 7510006343210, 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 A-A-1689 TY1CL2.