8.1.3 Metric Bolt Speci
fi
cations Bolting into Cast Aluminum
Table 8.9 Metric Bolt Bolting into Cast Aluminum
Bolt Torque
8.8
(Cast Aluminum)
10.9
(Cast Aluminum)
Nominal
Size (A)
Nm
lbf·ft
Nm
lbf·ft
M3
–
–
–
1
M4
–
–
4
2.6
M5
–
–
8
5.5
M6
9
6
12
9
M8
20
14
28
20
M10
40
28
55
40
M12
70
52
100
73
M14
–
–
–
–
M16
–
–
–
–
Figure 8.9: Bolt Grades
8.1.4 Flare-Type Hydraulic Fittings
1. Check
fl
are (A) and
fl
are seat (B) for defects that might
cause leakage.
2. Align tube (C) with
fi
tting (D) and thread nut (E) onto
fi
tting without lubrication until contact has been made
between
fl
ared surfaces.
3. Torque
fi
tting nut (E) to speci
fi
ed number of
fl
ats from
fi
nger tight (FFFT) or to a given torque value in Table
8.10 Flare-Type Hydraulic Tube Fittings, page 85
.
4. Use two wrenches to prevent
fi
tting (D) from rotating.
Place one wrench on
fi
tting body (D), and tighten
nut (E) with other wrench to torque shown.
5. Assess
fi
nal condition of connection.
Figure 8.10: Hydraulic Fitting
214047
84
Revision A
