... in Cold Drawn seamless steel pipe, torsion spring tube,keyway used for garage door / Garage door tube shaft / Garage door accessory ... , JIS G3466.GradeQ195, Q215, Q235, Q295, Q345, ST37, ST52, Grade A, Grade B.20#, 45#, etc.End FinishPlain/ beveled ends or threaded with ... key way: torsion spring tube with keyway, tension bar, keyway used for garage door