¡ß METRIC(KS B 1002)(JIS B 1180) Unit: mm
Bolt
diameter		 d©û H B C

App		 R

Min		 S Pitch
Basic Tolerance Basic Tolerance Basic Tolerance Coarse Fine
Finish Semi-finish Regular Finish Semi-finish Regular Finish Semi-finish Regular

M6

M8
M10
M12
(M14)
M16
(M18)
M20
(M22)
M24
(M27)
M30
(M33)
M36
M42
6

8
10
12
14
16
18
20
22
24
27
30
33
36
42 		0
-0.1

0
-0.15



0
-0.2




0
-0.25
0
-0.2



0
-0.25



0
-0.35

0
-0.4

 		+0.6
-0.15

+0.7
-0.2

+0.9
-0.2



+0.95
-0.35

+1.2
-0.4
4

5.5
7
8
9
10
12
13
14
15
17
19
21
23
26
¡¾0.15







¡¾0.2





¡¾0.25
¡¾0.25



¡¾0.3




¡¾0.35




¡¾0.4
¡¾0.6



¡¾0.8




¡¾0.9




¡¾1.0
10

13
17
19
22
24
27
30
32
36
41
46
50
55
65 		0
-0.2

0
-0.25

0
-0.35




0
-0.4

0
-0.45 		0
-0.6

0
-0.7

0
-0.8




0
-1.0

0
-1.2 		0
-0.6

0
-0.7

0
-0.8




0
-1.0

0
-1.2
11.5

15
19.6
21.9
25.4
27.7
31.2
34.6
37
41.6
47.3
53.1
57.7
63.5
75
0.25

0.4
0.4
0.6
0.6
0.6
0.6
0.8
0.8
0.8
1
1
1
1
1.2
18

22
26
30
34
38
42
46
50
54
60
66
72
78
90
1

1.25
1.5
1.75
2
2
2.5
2.5
2.5
3
3
3.5
3.5
4
4.5
-

1
1.25
1.25
1.5
1.5
1.5
1.5
1.5
2
2
2
2
3
-

¡ßUNIFIED (ANSI B 18.2.1) Unit: inch
d©û B C H R S(Ref)

Nominal Size or Basic Bolt Dia
Body
Dia
Width Across
Flots
Width Across
Corners
Height
Radius
of Fillet 		Thread Length
ForBolt
Lengths¡Â 6in 		ForBolt
Lengths£¾ 6in
Max Basic Max Min Max Min Basic Max Min Max Min Basic Basic
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/4 		0.2500
0.3125
0.3750
0.4375
0.5000
0.6250
0.7500
0.8750
1.0000
1.1250
1.2500
1.3750
1.5000
1.7500
2.0000
2.2500 		0.260
0.324
0.388
0.452
0.515
0.642
0.768
0.895
1.022
1.149
1.277
1.404
1.531
1.875
2.039
2.305 		7/16
1/2
9/16
5/8
3/4
15/16
1-1/8
1-5/16
1-1/2
1-11/16
1-7/8
2-1/16
2-1/4
2-5/8
3
3-3/8 		0.438
0.500
0.562
0.625
0.750
0.938
1.125
1.312
1.500
1.688
1.875
2.062
2.250
2.625
3.000
3.375 		0.425
0.484
0.544
0.603
0.725
0.906
1.088
1.269
1.450
1.631
1.812
1.994
2.175
2.538
2.900
3.262 		0.505
0.577
0.650
0.722
0.866
1.083
1.299
1.516
1.732
1.949
2.165
2.382
2.598
3.031
3.464
3.897 		0.484
0.552
0.620
0.687
0.826
1.033
1.240
1.477
1.653
1.859
2.066
2.273
2.480
2.893
3.306
3.719 		11/64
7/32
1/4
19/64
11/32
27/64
1/2
37/64
43/64
3/4
27/32
29/32
1
1-5/32
1-11/32
1-1/2 		0.188
0.235
0.268
0.316
0.364
0.444
0.524
0.604
0.700
0.780
0.876
0.940
1.036
1.196
1.388
1.548 		0.150
0.195
0.226
0.272
0.302
0.378
0.455
0.531
0.591
0.658
0.749
0.810
0.902
1.054
1.175
1.327 		0.03
0.03
0.03
0.03
0.03
0.06
0.06
0.06
0.09
0.09
0.09
0.09
0.09
0.12
0.12
0.19 		0.01
0.01
0.01
0.01
0.01
0.02
0.02
0.02
0.03
0.03
0.03
0.03
0.03
0.04
0.04
0.06 		0.750
0.875
1.000
1.125
1.250
1.500
1.750
2.000
2.250
2.500
2.750
3.000
3.250
3.750
4.250
4.750 		1.000
1.125
1.250
1.375
1.500
1.750
2.000
2.250
2.500
2.750
3.000
3.250
3.500
4.000
4.500
5.000

¡ßHEAVY (ANSI B 18.2.1)       Unit: inch
d©û B C H R S(Ref)

Nominal Size or Basic Bolt Dia
Body
Dia
Width Across
Flots
Width Across
Corners
Height
Radius
of Fillet 		Thread Length
ForBolt Lengths ¡Â 6in ForBolt Lengths £¾6in
Max Basic Max Min Max Min Basic Max Min Max Min Basic Basic
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
 0.5000
0.6250
0.7500
0.8750
1.0000
1.1250
1.2500
1.3750
1.5000
1.7500
2.0000
2.2500
2.5000
2.7500
3.0000
 0.515
0.642
0.768
0.895
1.022
1.149
1.277
1.404
1.531
1.785
2.039
2.305
2.559
2.872
3.081
 7/8
1-1/16
1-1/4
1-7/16
1-5/8
1-13/16
2
2-3/16
2-3/8
2-3/4
3-1/8
3-1/2
3-7/8
4-1/4
4-5/8
 0.875
1.062
1.250
1.438
1.625
1.812
2.000
2.188
2.375
2.750
3.125
3.500
3.875
4.250
4.625
 0.850
1.031
1.212
1.394
1.575
1.756
1.938
2.119
2.300
2.662
3.025
3.388
3.750
4.112
4.475
 1.010
1.227
1.443
1.660
1.876
2.093
2.309
2.562
2.742
3.175
3.608
4.041
4.474
4.907
5.340
 0.969
1.175
1.383
1.589
1.796
2.002
2.209
2.416
2.622
3.035
3.449
3.862
4.275
4.688
5.102
 11/32
27/64
1/2
37/64
43/64
3/4
27/32
29/32
1
1-5/32
1-11/32
1-1/2
1-21/32
1-13/16
2
 0.364
0.444
0.524
0.604
0.700
0.780
0.876
0.940
1.036
1.196
1.388
1.548
1.708
1.869
2.060
 0.302
0.378
0.455
0.531
0.591
0.658
0.749
0.810
0.902
1.054
1.175
1.327
1.479
1.632
1.815
 0.03
0.06
0.06
0.06
0.09
0.09
0.09
0.09
0.09
0.12
0.12
0.19
0.19
0.19
0.19
 0.01
0.02
0.02
0.02
0.03
0.03
0.03
0.03
0.03
0.04
0.04
0.06
0.06
0.06
0.06
 1.250
1.500
1.750
2.000
2.250
2.500
2.750
3.000
3.250
3.750
4.250
4.750
5.250
5.750
6.250
 1.500
1.750
2.000
2.250
2.500
2.750
3.000
3.250
3.500
4.000
4.500
5.000
5.500
6.000
6.500