TM 9-2320-364-20-4 2-3218 2-47.  GENERAL INSTALLATION INSTRUCTIONS (CONT). f. Hose and Fitting Tightening  Procedure. NOTE Tighten hoses and fittings as required in Apendix E or in each maintenance task.  If a torque wrench and crowsfoot are not available or cannot be used, use following procedure. (1) Install hose nut (1) on fitting (2). NOTE When turning effort increases, hose nut seat is in contact with fitting seat. (2) Tighten hose nut (1) until seated on fitting (2). NOTE Alignment marks allow the mechanic to count the number of flats the hose nut has rotated during tightening. (3) Scribe alignment mark on hose nut (1) and fitting (2). (4) Tighten hose nut (1) until mark on hose nut has rotated correct number of flats (Refer to Table 2-67). Table 2-67.  Recommended Flats Rotation Dash SAE 37 Degree SAE 45 DEGREE 37 DEGREE No. Flared Hose and Fitting Flared Hose and Fitting Flared Tube -4 1 1/2 - 1 3/4 1 -1 1/4 2 1/4 - 2 3/4 -5 1 - 1 1/2 1 - 1 1/4 2 1/4 - 2 3/4 -6 1 - 1 1/2 3/4 - 1 2 1/4 - 2 3/4 -8 1 1/4 - 1 3/4 1 -1 1/4 2 1/4 - 2 3/4 -10 1 1/4 - 1 3/4 1 - 1 1/4 2 - 2 1/2 -12 1 - 1 1/2 1 - 1 1/4 2 - 2 1/2 -16 3/4 - 1 ----- 2 1/4 - 2 3/4 -20 1/2 -3/4 ----- 1 1/4 - 1 3/4 -24 1/2 -3/4 ----- 3/4 - 1 1/4 -32 3/4 ----- 1 - 1 1/4 ALIGNMENT MARKS 1 2 37 37 45 45 37 37 MALE HALF FEMALE HALF MALE HALF FEMALE HALF MALE HALF FEMALE HALF