ZZ-H-428D, FEDERAL SPECIFICATION: HOSE, NON-METALLIC AND HOSE, PREFORMED: (FOR THE COOLANT SYSTEMS OF AUTOMOTIVE AND OTHER LIQUID-COOLED ENGINES) (8 MAY 1974) [S/S BY SAE-J20]

ZZ-H-428D, FEDERAL SPECIFICATION: HOSE, NON-METALLIC AND HOSE, PREFORMED: (FOR THE COOLANT SYSTEMS OF AUTOMOTIVE AND OTHER LIQUID-COOLED ENGINES) (8 MAY 1974) [S/S BY SAE-J20]., This specification covers preformed (curved) and straight hose; and wire-reinforced hose, for the coolant systems and heaters of automotive and liquid-cooled engines for use in ambient temperatures of -65 deg F