Convert
Convert
From
To
Multiply
From
To
Multiply
lb.in.
oz.in.
16
oz.in.
lb.in.
.0625
lb.in.
lb.ft.
.08333
lb.ft.
lb.in.
12
lb.in.
kg.cm.
1.1519
kg.cm.
lb.in.
.8681
lb.in.
kg.m.
.011519
kg.m.
lb.in.
86.81
lb.in.
N•m
.133
N•m
lb.in.
8.85
lb.in.
dN•m
1.13
dN•m
lb.in.
.885
lb.ft.
kg.m.
.1382
kg.m.
lb.ft.
7.236
lb.ft.
N•m
1.356
N•m
lb.ft.
.7376
N•m
dN•m
10
dN•m
N•m
.10
N•m
kg.cm.
10.2
kg.cm.
N•m
.09807
N•m
kg.m.
.102
kg.m.
N•m
9.807
CONVERSION OF VARIOUS UNITS OF TORQUE
GENERAL TORQUE SPECIFICATION CHART FOR I.S.O.** METERIC FASTENERS*** ( when SAE 10 oil is used as a lubricant )
Minimum
40
50
60
80
100
120
Tensile
kg/mm2
Strength
P.S.I.
56900
71100
85340
113800
142200
170700
Proof
kg/mm2
22.6
29.1
28.2
36.4
33.9
43.7
47.5
58.2
79.2
95
Load
P.S.I.
32150
41390
40110
51770
48220
62160
67560
82780
112650
135130
Property Class
4.6
4.8
5.6
5.8
6.6
6.8
6.9
8.8
10.9
12.9
Figures are KILOGRAM METER except those that are
bolded
which are KILOGRAM CENTEMETER
Metric
Inch
6 mm
0.236
49
63
61
79
74
95
103
126
172
206
8 mm
0.315
119
153
148
191
178
230
250
306
417
500
10 mm
0.394
235
303
294
379
353
455
495
606
8.2
10
12 mm
0.472
411
529
427
662
616
7.9
8.6
10.5
14
17
14 mm
0.551
654
8.4
8.2
10.5
10
12
13
17
23
27
16 mm
0.63
10
13
12
16
15
20
21
26
36
43
18 mm
0.709
14
18
17
23
21
27
30
36
49
59
22 mm
0.866
27
35
34
44
41
52
57
70
95
114
*** NOTE: Use only when manufacture's specifications are not available, these values are for stiff metal-to-metal joints and are based on 90% of proof load.
DO NOT USE for gasket joints or joints of soft materials
** I.S.O.= International Standardization Organization.
Bolt Diameter
GENERAL TORQUE SPECIFICATION CHART
FOR I.F.I.* METRIC FASTENERS**
( when SAE10 oil is used as a lubricant )
Minimum Tensile ***
Strength Mpa
400
420
520
830
900
1040
1220
Proff Load MPa
225
310
380
600
650
830
970
Property Class
4.6
4.8
5.8
8.8
9.8
10.9
12.9
Bolt Diameter
metric
inch
5mm
0.197
2.9
4
5
-
8
11
12
6mm
0.236
5
7
8
-
14
18
21
7mm
0.276
8
11
14
-
24
30
35
8mm
0.315
12
16
20
-
34
44
50
10mm
0.394
23
32
40
-
70
85
100
12mm
0.472
40
56
70
-
120
150
180
14mm
0.551
65
90
110
-
190
240
280
16mm
0.63
100
140
170
270
290
380
440
20mm
0.787
200
-
330
520
-
740
860
24mm
0.945
340
-
580
920
1260
1480
-
30mm
1.181
680
-
-
1820
-
2520
2940
*** Megapascal
** Note: Use only when manufacture's specifications are not available, these values are for stiff metal-to-metal joints and are
based on 90% of proof load. DO NOT USE for gaskets joints or joints of soft materials.
* I.F.I. = Industrial fasteners Institute.
Torque: Newton Metre
THREADED FASTENER TENSION GUIDE
Stress Area
0.0091
0.0141
0.0175
0.0318
0.0524
0.0775
0.1063
0.1419
0.1819
0.226
0.3344
0.4617
0.6057
0.7632
0.9691
1.4052
1.8993
Outside Diameter
No.6
No.8
No.10
1/4"
5/16"
3/8"
7/16"
1/2"
9/16"
5/8"
3/4"
7/8"
1"
1-1/8"
1-1/4"
1-1/2"
1-3/4"
Threads Per Inch
32
32
24
20
18
16
14
13
12
11
10
9
8
7
7
6
5
Torque: 5 lb.in.
205
157
10 lb.in.
410
316
315
20 lb.in.
820
632
630
337
40 lb.in.
1264
1264
674
541
80 lb.in.
1348
1082
987
10 lb.ft.
2043
1625
1482
1224
20 lb.ft.
4092
3250
2964
2448
2143
40 lb.ft.
6503
5928
4896
4286
3899
80 lb.ft.
11857
9796
8572
7799
7065
100 lb.ft.
12245
10716
9749
8832
7915
125 lb.ft.
13395
12186
11049
9894
150 lb.ft.
16091
14623
13261
11872
175 lb.ft.
17061
15462
13851
12117
200 lb.ft.
19498
17664
15830
13836
12113
250 lb.ft.
24373
22100
19788
17296
15142
11985
300 lb.ft.
26523
23745
20776
18170
14382
13247
400 lb.ft.
31660
27700
24227
19176
17663
500 lb.ft.
39576
34592
30284
23971
22079
19754
750 lb.ft.
51941
45426
35956
33118
29631
22678
In some cases it may be desirable to know the total clamping force obtained for a given torque. Values are approximate. SAE 30 engine oil was
used as lubricant. Use of high stress lube may increase value 20% or more. Highest values for a given size may only be obtained with heat
treated bolts having minimum tensile strengths of 150,000 P.S.I. or more.
* Stress area is calculated as the area of the circle whose diameter is the mean between the root and pitch diameters. This
closely approximates the actual stress condition. Maximum theoretical clamping force cannot be obtained from threaded
fasteners. Additional stresses to the fastener are caused by the torsional forces of tightening.
( Figures Represent Pounds of Clamping Force )
Caution
Caution
Caution
Caution
Always use manufacturers specifications when available. These specifications are approximate and may not be appropriate
for some applications. No liability is assumed for errors which may result from the use of any of these specifications.
Minimum
PRODUCTION TORQUE GUIDE
Fastener
Type
Tensile
Material
Body size of Outside Diameter
Strength
2
3
4
5
6
8
10 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8
1
1-1/8 1-1/4 1-3/8 1-1/2
S.A.E 2 Steel
74000 P.S.I
Low Carbon
6
12
20
32
47
69
96 155 206 310 480
675
900 1100
S.A.E. 5 Steel
120000 P.S.I
Medium Carbon Heat
Treat
10
19
33
54
78 114 154 257 382 587 794 1105 1500 1775
S.A.E. 7 Steel
133000 P.S.I.
Medium Carbon Alloy
13
25
44
71 110 154 215 360 570 840 1325 1825 2500 3000
S.A.E. 8 Steel
150000 P.S.I.
Medium Carbon Alloy
14
29
47
78 119 169 230 380 600 900 1430 1975 2650 3200
Socket Head
Cap Screw
160000 P.S.I.
High Carbon Quenched
Tempered
16
33
54
84 125 180 250 400 640 970 1520 2130 2850 3450
Socket Set
Screw
212000 P.S.I.
High Carbon Quenched
Tempered
9* 16* 30* 70* 140*
18
29
43
63 100 146
Machine Screw
Stainless
18-8
2.6* 4* 5.5* 8* 10* 20* 23* 75* 132*
20
31
43
58
95 130 194 260 400
500
725
Machine Screw
Stainless
316
2.7* 4* 5.7* 8* 10* 22* 25* 80* 140*
22
34
46
60 100 135 210 280 425
515
750
Machine Screw
Yellow Brass
60000 P.S.I.
CU 63 ZN 37
2* 3.3* 4.4* 6.4* 8* 16* 20* 65* 110*
17
27
37
49
78 104 160 215 325
400
595
Silicone Bronze
Type "B"
70000 P.S.I.
CU 96 ZNI-5 Min.
2.3* 3.7* 4.9* 7.2* 10* 19* 22* 70* 125*
20
30
41
53
88 117 180 250 365
450
655
Machine Screw
Aluminum
55000 P.S.I.
CU 3.8-4.9 1.2-1.8
MN .3-.9
1.4* 2.1* 2.9* 4.3* 5.4* 12* 15* 46* 82*
13
20
27
36
62 83 128 170 255
315
460
Machine Screw
Monel
82000 P.S.I.
NI 67 CU 30 FE 1.4
2.5* 4* 5.5* 8* 11* 21* 27* 87* 155*
23
36
50
67 115 155 235 315 475
585
850
Sems Heat
Treated Steel
120000 P.S.I.
1018 1022
4*
5*
7* 11* 15* 27* 37* 90* 200* 330*
Studs
Use SAE 2.5 and 8 values when grade is known, with nut of sufficient strength.
All figures are POUND FEET except those marked with an
ASTERISK ( * )
WHICH ARE pound inches.
These values are for lubricated fasteners.
Tapping Screw Set up joint as it will be in production use 70% of over-torque failure as production specifications.
MECHANICAL AND ELECTRONIC TORQUE PRODUCTS
FULL 12-MONTH WARRANTY
PROFESSIONAL USE
SNAP-ON TOOLS MANUFACTURING COMPANY WARRANTS TO THE
ORIGINAL PURCHASER OF TORQUE PRODUCTS FOR BUSINESS
OR PROFESSIONAL USE THAT THE COMPANY’S TORQUE
PRODUCTS ARE FREE FROM DEFECTS IN WORKMANSHIP AND
MATERIALS. Snap-on will repair or replace torque products which fail to
give satisfactory service due to defective workmanship or materials
(excluding calibration) for 12 months from the date of original purchase.
Snap-on warrants “initial, out of box calibration” of each new, unused
torque product. Repair, replacement or recalibration shall be at the
election and expense of Snap-on Tools Manufacturing Company, and is
your exclusive remedy in place of all other rights and remedies. Products
must be returned with proof of purchase to a Snap-on repair center or an
authorized Snap-on representative for warranty service.
Consumable products are warranted only against defects in workmanship
or materials in a new product that prevents its use. Consumable products
are goods reasonably expected to be used up or damaged during use,
including but not limited to sensors, internal mechanical torque wrench
components and batteries. Snap-on does not provide any warranty for
products subjected to abnormal use. Abnormal use includes misuse,
accident, modification, unreasonable use, neglect, lack of maintenance,
use in production-related service, or use after the tool is significantly worn.
SNAP-ON SHALL NOT BE LIABLE FOR ANY INCIDENTAL, SPECIAL
OR CONSEQUENTIAL COSTS OR DAMAGES INCURRED BY THE
PURCHASER OR OTHERS (including without limitation, lost profits,
revenues, anticipated sales, business opportunities, goodwill, or
interruption of business and any other injury or damage.)
CONSUMER WARRANTY INFORMATION
Consumers buying for personal use can obtain product warranty
information by sending a written request, including the catalog number,
page number and a description of the products, to:
Snap-on Tools
Consumer Warranty Information Center
2801 - 80th Street
Kenosha, Wisconsin 53143 Rev 10/00
If Your Torque Wrench Needs Repair
1. Send it to an authorized Snap-on Service Center, or give it
to your Snap-on representative. Do not attempt to repair it
yourself.
2. If the warranty is no longer in effect, your Snap-on
Customer Service Representative will contact you with repair
charges for your approval before being repaired.
3. A series of testers are available from Snap-on for
checking the accuracy of your Torque Wrench. See your
Snap-on representative for more information.
Visit us at www.torqwrench.com