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” 

9  #3-48 

 

 

 5/16” 

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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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

Catalog Combustion 2021 - Page 1014

Fives Group
FIVES GROUP
FIVES GROUP-FIVES GROUP-1014-1001

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