TM-5-2330-378-14-P
SEMITRAILER, LOWBED: 40 TON CONSTRUCTION EQUIPMENT TRANSPORTER M870 AND M870A1
TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
JUNE 1999
TM-5-2330-378-14-P - Page 486 of 524
TM 5-2330-378-14&P
H-3. HOW TO USE TORQUE TABLE (continued).
5.
To find the grade of the screw that is to be installed,
match the markings on the head to the correct picture of
CAPSCREW
HEAD MARKINGS
on the table.
CAPSCREW
HEAD MARKINGS
Manufacturer's
marks may vary.
These are all SAE Grade No. 5 (3 lines).
6.
Lookdown
the column underthe picturefound
in step 5 until thetorque
limit in foot-poundsforthe
diameterand
threads per inch of the screw being installed is found.
Table H-1. Torque Limits for Dry Fasteners
SAE CAPSCREW
HEAD
MARKINGS
[9
[a [a
SIZE
TORQUE
SAE GRADE
SAE GRADE
SAEGRADE
SAE GRADE
No. 1 or 2
No. 5
No. 6 or 7
No. 8
FOOT.
N-m
FOOT-
N-rn
FOOT.
N-m
DIA.
THREADS
FOOT-
N-m
P
P
POUNDS
(IN.)
_EERINCH
MM
POUNDS
OUNDS
OUNDS
1/4
20
6.35
5
6.78
8.0
10.85
10
13.56
12
16.27
1/4
28
6.35
6
8.14
10.0
13.56
-
-
14
18.98
5/16
18
7.94
11
14.92
17.0
23.05
19
25.76
24
32.52
5/16
24
7.94
13
17.63
19.0
25.76
-
-
27
36.61
3/8
16
9.53
18
24.41
31,0
42.04
34
46.10
44
59.66
3/8
24
9.53
20
27.12
35.0
47.46
- -
49
66.44
7116
14
11.11
28
37.97
49.0
66.44
55
74.58
70
94.92
7/16
20
-
30
40.68
55.0
74.58
-
-
78
105.77
1/2
13
12.70
39
52.88
75.0
101.70
85
116.26
105
142.38
1/2
20
-
41
55.60
85.0
115.26
- -
120
162.78
9116
12
14.28
51
69.16
110.0
149.16
120
162.72
155
210.18
9/16
18
-
55
74.58
120.0
162.72
-
-
170
230.52
5/8
11
15.88
63
85.43
150.0
203.40
167
226.45
210
284.76
5/8
Is
-
95
128.82
170.0
230.52
- -
240
325.44
314
10
19.05
105
142.38
270.0
356.12
280
379.68
375
506.50
3/4
16
-
115
155.94
295.0
400.02
-
-
420
596.52
7/8
9
22.23
160
216.96
375.0
536.62
440
596.64
605
820.38
7/8
14
-
175
237.30
435.0
599.85
-
-
675
915.30
1
8
25.40
235
318.66
590.0
800.04
660
694.96
910
1233.96
1
14
-
250
338.00
660.0
894.96
- -
990
1342."
1 1/8
- 25.58
-
-
800.0
1064.80
1280
1735.70
880.0
1193.30
1444
1952.80
1 1/4
- 31.75
-
-
-
1820
2467.90
2000
2712.00
1 3/8
- 34.93
-
1460.0
1979.80
2300
3227.30
1680.0
2278.10
2720
3688.30
11/2
-
38.10
-
1940.0
2630.60
3160
4285.00
2200.0
2963.20
3560
4827.40
H-2
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