| Table
1 - Torque-Tension Relationships for SAE Grades 2, 5 and 8 |
Nom.
Size
and
Threads
/ in. |
Stress
Area
(1)
in. 2 |
Grade
2
Clamp
Load
Lb. |
Grade
2
Torque
Dry
k=0.2
in - lb. |
Grade
2
Clamp
Load lb. |
Grade
5
Clamp
Load
lb. |
Grade
5
Torque
Dry k=0.2
in-lb. |
Grade
5
Torque
Lub
k=0.15
in-lb |
Grade
8
Clamp
Load
Lb. |
Grade
8
Torque
Dry
k=0.2
in-lb. |
Grade
8
Torque
Lub
k=0.15
in-lb. |
0.138-40 |
0.01014 |
418.0 |
10.2 |
7.7 |
647.5 |
15.6 |
11.7 |
913.5 |
23.4 |
17.6 |
0.138-32 |
0.00909 |
401.0 |
9.6 |
7.2 |
579.5 |
14.4 |
10.8 |
818.0 |
21.0 |
15.8 |
0.164.36 |
0.01473 |
608.0 |
17.4 |
13.1 |
938.5 |
27.6 |
20.7 |
1306.0 |
40.2 |
30.2 |
0.164-31 |
0.01401 |
578.0 |
16.8 |
12.6 |
893.0 |
25.8 |
19.4 |
1261.0 |
40.2 |
30.2 |
0.190-32 |
0.01999 |
825.0 |
28.2 |
21.2 |
1275.0 |
43.2 |
32.4 |
1798.5 |
63.6 |
47.7 |
0.190-24 |
0.01753 |
723.0 |
24.6 |
18.5 |
1117.5 |
37.2 |
27.9 |
1577.5 |
55.8 |
41.9 |
0.250-28 |
0.03637 |
1500.0 |
75.0 |
56.0 |
2319.0 |
116.0 |
87.0 |
3273.0 |
164.0 |
123.0 |
0.250-20 |
0.03182 |
1313.0 |
66.0 |
49.0 |
2029.0 |
101.0 |
76.0 |
2864.0 |
143.0 |
107.0 |
0.3125-24 |
0.05807 |
2395.0 |
150.0 |
112.0 |
3700.0 |
230.0 |
173.0 |
5225.0 |
327.0 |
245.0 |
0.3125-18 |
0.05243 |
2163.0 |
135.0 |
101.0 |
3342.0 |
209.0 |
157.0 |
4719.0 |
295.0 |
221.0 |
.0375-24 |
0.08783 |
3623.0 |
272.0 |
204.0 |
5600.0 |
420.0 |
315.0 |
7905.0 |
893.0 |
445.0 |
.0375-16 |
0.07749 |
3196.0 |
240.0 |
180.0 |
4940.0 |
370.0 |
278.0 |
6974.0 |
523.0 |
392.0 |
0.4375-20 |
0.11872 |
4896.0 |
428.0 |
321.0 |
7567.0 |
662.0 |
496.0 |
10638.0 |
935.0 |
700.0 |
0.4375-14 |
0.10631 |
4385.0 |
384.0 |
288.0 |
6777.0 |
593.0 |
445.0 |
9567.0 |
837.0 |
628.0 |
0.500-20 |
0.15995 |
6598.0 |
660.0 |
495.0 |
10197.0 |
1020.0 |
764.0 |
14396.0 |
1440.0 |
1080.0 |
0.500-13 |
0.14190 |
5853.0 |
585.0 |
439.0 |
9046.0 |
904.0 |
678.0 |
12771.0 |
1277.0 |
958.0 |
| Table
2 - Torque-Tension Relationships for Metric Property Classes |
Major
Diameter
and
Thread
Pitch |
Stress
Area
mm2 |
Class
4.6
Clamp Load
kN |
Class
4.6
Torque
Dry
k=0.2
N-m |
Class
4.6
Torque
Lub
k=0.15
N-m |
Class
4.8
Clamp Load
kN |
Class
4.8
Torque
Dry
k=0.2
N-m |
Class
4.8
Torque
Lub
k=0.15
N-m |
Class
5.8
Clamp Load
kN |
Class
5.8
Torque
Dry
k=0.2
N-m |
Class
5.8
Torque
Lub
k=0.15
N-m |
3.0x0.5 |
5.03 |
.085 |
0.50 |
0.40 |
1.17 |
0.70 |
0.50 |
. |
. |
. |
3.5x0.6 |
6.78 |
1.14 |
0.80 |
0.60 |
1.58 |
1.10 |
0.80 |
. |
. |
. |
4.0x0.7 |
8.78 |
1.14 |
1.20 |
0.90 |
2.04 |
1.60 |
1.20 |
. |
. |
. |
5.0x0.8 |
14.2 |
2.40 |
2.40 |
1.80 |
3.30 |
3.30 |
2.50 |
4.05 |
4.00 |
3.00 |
6.0x1.0 |
20.10 |
3.40 |
4.00 |
3.00 |
4.67 |
5.66 |
4.20 |
5.73 |
6.90 |
5.20 |
8.0x1.25 |
36.60 |
6.18 |
9.90 |
7.40 |
8.51 |
13.60 |
10.20 |
10.40 |
16.70 |
12.50 |
10.0x1.50 |
58.00 |
9.79 |
19.60 |
14.70 |
13.48 |
27.00 |
20.00 |
16.50 |
33.10 |
24.80 |
12.0x1.75 |
84.30 |
14.22 |
34.10 |
25.60 |
19.60 |
47.00 |
35.00 |
24.00 |
58.00 |
43.00 |
Tensile
Strength
Proof Load Stress |
400
MPa
224 MPa |
420
MPa
310 MPa |
520
MPa
380 MPa |
Major
Diameter
and
Thread
Pitch |
Stress
Area
mm2 |
Class
8.8
Clamp Load
kN |
Class
8.8
Torque
Dry
k=0.2
N-m |
Class
8.8
Torque
Lub
k=0.15
N-m |
Class
9.8
Clamp Load
kN |
Class
9.8
Torque
Dry
k=0.2
N-m |
Class
9.8
Torque
Lub
k=0.15
N-m |
Class
10.9
Clamp Load
kN |
Class
10.9
Torque
Dry
k=0.2
N-m |
Class
10.9
Torque
Lub
k=0.15
N-m |
3.0x0.5 |
5.03 |
. |
. |
. |
. |
. |
. |
. |
. |
. |
3.5x0.6 |
6.78 |
. |
. |
. |
. |
. |
. |
. |
. |
. |
4.0x0.7 |
8.78 |
. |
. |
. |
. |
. |
. |
. |
. |
. |
5.0x0.8 |
14.20 |
. |
. |
. |
. |
. |
. |
. |
. |
. |
6.0x1.0 |
20.10 |
. |
. |
. |
. |
. |
. |
. |
. |
. |
8.0x1.25 |
36.60 |
16.50 |
26.40 |
19.80 |
17.80 |
28.50 |
21.40 |
22.80 |
36.50 |
27.30 |
10.0x1.50 |
58.00 |
26.10 |
52.20 |
39.20 |
28.30 |
56.60 |
42.40 |
36.10 |
72.20 |
54.20 |
12.0x1.75 |
84.30 |
37.90 |
91.00 |
68.00 |
41.10 |
99.00 |
74.00 |
52.50 |
126.00 |
94.00 |
Tensile
Strength
Proof Load Stress |
830
MPa
600 MPa |
900
Pa
650 Pa |
1040
Pa
830 Pa |
NOTE: The
stress area of threaded series not included in Table 2 may
be computed from the equation: As=0.7854 (D - 0.9382P)2 WHERE:
As=Stress area in mm2 D=Diameter in mm P=Pitch in mm
CAUTION: The
previously listed torque and resulting tension are provided as
an advisory guide. Individual application discretion is recommended.
The content, has been presented as accurately as possible, but
responsibility for its application lies with the user, and Elgin
Fastener Group is not responsible for any loss, claim, or damage
arising there from. A complete discussion and tutorial on Torque
Tensioning is available from Elgin Fastener Group by request. |
