2-2
LANDOLL CORPORATION
GENERAL TORQUE SPECIFICATIONS (REV. 4/97)
THIS CHART PROVIDES TIGHTENING TORQUES FOR GENERAL PURPOSE APPLICATIONS WHEN SPECIAL TORQUES ARE NOT SPECIFIED ON
PROCESS OR DRAWING.
ASSEMBLY TORQUES APPLY TO PLATED NUTS AND CAPSCREWS ASSEMBLED WITHOUT SUPPLEMENTAL LUBRICATION (AS RECEIVED
CONDITION). THEY DO NOT APPLY IF SPECIAL GRAPHITE MOLY-DISULFIDE OR OTHER EXTREME PRESSURE LUBRICANTS ARE USED.
WHEN FASTENERS ARE DRY (SOLVENT CLEANED), ADD 33% TO AS RECEIVED CONDITION TORQUE.
BOLT HEAD IDENTIFICATION MARKS INDICATE GRADE AND MAY VARY FROM MANUFACTURER TO MANUFACTURER.
THICK NUTS MUST BE USED ON GRADE 8 CAPSCREWS.
USE VALUE IN [
] IF USING PREVAILING TORQUE NUTS.
TORQUE IS SPECIFIED IN FOOT POUNDS
UNC
Size
SAE
Grade
2
SAE Grade
5
SAE Grade
8
UNF
Size
SAE
Grade
2
SAE Grade
5
SAE Grade
8
1/4-20
4
[5]
6
[7]
9
[11]
1/4-28
5
[6]
7
[9]
10
[12]
5/16-18
8
[10]
13
[16]
18
[22]
5/16-24
9
[11]
14
[17]
20
[25]
3/8-16
15
[19]
23
[29]
35
[43]
3/8-24
17
[21]
25
[31]
35
[44]
7/16-14
24
[30]
35
[43]
55
[62]
7/16-20
27
[34]
40
[50]
60
[75]
1/2-13
35
[43]
55
[62]
80
[100]
1/2-20
40
[50]
65
[81]
90
[112]
9/16-12
55
[62]
80
[100]
110
[137]
9/16-18
60
[75]
90
[112]
130
[162]
5/8-11
75
[94]
110
[137]
170
[212]
5/8-18
85
[106]
130
[162]
180
[225]
3/4-10
130
[162]
200
[250]
280
[350]
3/4-16
150
[188]
220
[275]
320
[400]
7/8-9
125
[156]
320
[400]
460
[575]
7/8-14
140
[175]
360
[450]
500
[625]
1-8
190
[237]
408
[506]
680
[850]
1-14
210
[263]
540
[675]
760
[950]
1-1/8-7
270
[337]
600
[750]
960
[1200] 1-1/8-12
300
[375]
660
[825]
1080
[1350]
1-1/4-7
380
[475]
840
[1050]
1426
[1782] 1-1/4-12
420
[525]
920
[1150]
1500
[1875]
1-3/8-6
490
[612]
110
[1375]
1780
[2225] 1-3/8-12
560
[700]
1260
[1575]
2010
[2512]
1/1-2-6
650
[812]
1460
[1825]
2360
[2950] 1/1-2-12
730
[912]
1640
[2050]
2660
[3325]
METRIC
COARSE THREAD METRIC CLASS 10.9 FASTENERS AND CLASS 10.0 NUTS AND THROUGH HARDENED FLAT WASHERS, PHOSPHATE
COATED, ROCKWELL “C” 38-45.
USE VALUE IN [
] IF USING PREVAILING TORQUE NUTS.
Nominal
Thread
Diameter
mm
Standard Torque
Nominal
Thread
Diameter
mm
Standard Torque
Newton-
Meters
Foot-
Pounds
Newton-
Meters
Foot-
Pounds
6
10
[14]
7
[10]
20
385
[450]
290
[335]
7
16
[22]
12
[16]
24
670
[775]
500
[625]
8
23
[32]
17
[24]
27
980
[1105]
730
[825]
10
46
[60]
34
[47]
30
1330
[1470]
990
[1090]
12
80
[101]
60
[75]
33
1790
[1950]
1340
[1450]
14
125
[155]
90
[115]
36
2325
[2515]
1730
[1870]
16
200
[240]
150
[180]
39
3010
[3210]
2240
[2380]
18
275
[330]
205
[245]
Table 2-1 General Torque Specifications
Summary of Contents for LT08 Series
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