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Revision A
7.1.3
Metric Bolt Specifications Bolting into Cast Aluminum
Figure 7.9: Bolt Grades
Table 7.9 Metric Bolt Bolting into Cast Aluminum
Nominal
Size (A)
Bolt Torque
8.8
(Cast Aluminum)
10.9
(Cast Aluminum)
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
–
–
–
–
7.1.4
Flare-Type Hydraulic Fittings
Figure 7.10: Hydraulic Fitting
1.
Check flare (A) and flare seat (B) for defects that might
cause leakage.
2.
Align tube (C) with fitting (D) and thread nut (E) onto
fitting without lubrication until contact has been made
between flared surfaces.
3.
Torque fitting nut (E) to specified number of flats from
finger tight (FFFT) or to a given torque value in
Table
.
4.
Use two wrenches to prevent fitting (D) from rotating.
Place one wrench on fitting body (D), and tighten
nut (E) with other wrench to torque shown.
5.
Assess final condition of connection.
Table 7.10 Flare-Type Hydraulic Tube Fittings
SAE Dash Size
Thread Size (in.)
Torque Value
2
Flats from Finger Tight (FFFT)
Nm
lbf·ft
Tube
Swivel Nut or
Hose
-2
5/16
–
24
4
–
5
3
–
4
—
—
-3
3/8
–
24
7
–
8
5
–
6
—
—
-4
7/16
–
20
18
–
19
13
–
14
2-1/2
2
-5
1/2
–
20
19
–
21
14
–
15
2
2
2.
Torque values shown are based on lubricated connections as in reassembly.
