ELBOW FITTING MOST COMMONLY USED FOR THE FUEL RETURN LINE TO THE FUEL TANK FOR M35A2 TRUCKS. 

THIS FITTING IS ALSO USED ON M939A2 MODELS FOR THE TURBO OIL LINE. 

PART # 11660814-2, S-1014-1 NSN 4730-00-277-8274, 4730002778274