Torque Chart
General Bolt and Screw Connections
Bolts
Socket Head Screw
(ft -lb)
(ft -lb)
(ft -lb)
(in.-lb)
A574
SIZE:
A307, or
A325, or
SHC, or
SIZE:
GRADE
GRADE
GRADE
2 5 8
1/4”
2
6
9 #3-48
9
5/16”
5
13
18
#3-56
10
3/8"
10
23
33 #4-40
13
7/16"
15
40
52 #4-48
14
1/2"
20
65
95 #5-40
20
9/16"
40
95
135 #5-44
21
5/8"
55
130
185 #6-32
25
3/4"
100
230
325 #6-40
28
7/8"
165
370
500 #8-32
48
1"
250 560 800 #8-36 51
1-1/8"
350
810
1100 #10-24
70
1-1/4"
500
1120
1600 #10-32
76
1-3/8"
650
1500
2100
1-1/2"
850
1940 2750 1/4-20
160
M10
10
25
35 1/4-28 180
M12
20
65
95 5/16-18 325
M14
40
95
135 5/16-24 360
M16
55
130
185
M20
100
230
325
M24
250
560
800
M30
350
810
1100
M36
650
1500 2100
Torque values are for dry bolts. If the connection bolts are oil lubricated,
use 90% of the torque values.
If they are coated with anti-seize, use 60% of the torque values.
Instructions
&
Felt Seal List 2300/2400
Page 4
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t © 2020 - F
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ved | 2300/2400 instr
-pl 06/09
WARNING:
Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot
surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot
surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
Fives North American Combustion, Inc.
4455 East 71st Street - Cleveland, OH 44105 - USA
www.fi vesgroup.com
CONTACT
fna.sales@fi vesgroup.com
T +1 800 626 3477 - F +1 216 373 4237
