1 1/8
350
470
775
1025
1200
1600
1 1/4
500
660
1100
1470
1800
2400
1 1/2
880
1180
1900
2500
3000
4000
6 - Reduced tightening torque values: phosphated or zinc-flake-coated threads in inches
Nominal
dimension
Tensile grade
Tensile grade
Tensile grade
SAE 1 (ISO 10.9-BS B)
SAE 5 (ISO 8.8-BS S)
SAE 8 (ISO 10.9-BS V)
Torque lbf ft
Torque lbf ft
Torque lbf ft
Min.
Max.
Min.
Max.
Min.
Max.
#6
0.5
0.8
1
1.4
1.5
1.9
#8
1
1.4
2
2.6
2.7
3.7
#10
1.5
1.9
2.7
3.7
3.9
5.3
1/4
3.5
4.7
6.6
8.8
9
13
5/16
7
9.4
13
18
18
25
3/8
13
18
23
31
32
(44)
7/16
20
28
37
51
53
71
1/2
32
42
59
77
82
106
5/8
65
83
120
150
160
220
3/4
110
150
210
270
290
390
7/8
180
240
330
450
470
630
1
270
370
500
660
710
940
1 1/8
280
380
620
820
1000
1300
1 1/4
400
530
880
1180
1400
1900
1 1/2
700
940
1500
2000
2400
3200
1.1.4.2 Tightening torques for hydraulic unions
Use the tightening torques recommended for hydraulic unions according to the tables below:
• 1 for hydraulic unions with 37° flare
• 2 for EO2 hydraulic unions
• 3 for hydraulic unions with metric straight thread
• 4 for hydraulic unions with straight thread in inches
• 5 for steel unions with sealed thread.
When a specific torque is required, this is stated in the text.
The specifications for these tightening torques apply to zinc-plated steel unions used with hoses and rigid
hydraulic pipes that ideally include straight thread unions, unions with 37° flare or unions with an "O" ring
for bosses.
These values apply to dry assemblies. If the threads are oiled, reduce the tightening torques.
GUID-C9372A73-1E9A-44D6-A823-3E213BCDC08C [V1]
1. Introduction
1-20
ACX2831410
