ISO HOLE FIT TOLERANCES

The charts below gives the Limits and Fits for ISO 286-2 Hole Basis for holes ranging from3mm to 400mmand400mm to 3150mmandFit Types

Nominal Dimension and Tolerance Zone for Holes are in mm (Metric). ISO Hole Tolerances help the manufacturer to machine the parts with specified limits given by the design engineer.

ISO Hole Tolerance limits are designated with a Capital Letter as shown in the chart.

ISO TOLERANCES FOR HOLES (ISO 286-2) 3 - 400mm

NOMINAL HOLE SIZES (mm)
OVER3610183040506580100120140160180200225250 280315355
INCLUDING610183040506580100120140160180200225 250280315355400
micrometres (10 -6m)
E6+28
+20
+34
+25
+43
+32
+53
+40
+66
+50
+79
+ 60
+94
+72
+110
+85
+129
+100
+142
+110
+161
+125
E7+32
+20
+40
+25
+50
+32
+61
+40
+75
+50
+90
+ 60
+107
+72
+125
+85
+146
+100
+162
+110
+185
+125
E11+95
+20
+115
+25
+142
+32
+170
+40
+210
+50
+250
+ 60
+292
+72
+335
+85
+390
+100
+430
+110
+485
+125
E12+140
+20
+175
+25
+212
+32
+250
+40
+300
+50
+360
+ 60
+422
+72
+485
+85
+560
+100
+630
+110
+695
+125
E13+200
+20
+245
+25
+302
+32
+370
+40
+440
+50
+520
+ 60
+612
+72
+715
+85
+820
+100
+920
+110
+1 015
+125
F6+18
+10
+22
+13
+27
+16
+33
+20
+41
+25
+49
+ 30
+58
+36
+68
43
+79
+50
+88
+56
+98
+62
F7+22
+10
+28
+13
+34
+16
+41
+20
+50
+25
+60
+ 30
+71
+36
+83
43
+96
+50
+108
+56
+119
+62
F8+28
+10
+35
+13
+43
+16
+53
+20
+64
+25
+76
+ 30
+90
+36
+106
43
+122
+50
+137
+56
+151
+62
G6+12
+4
+14
+5
+17
+6
+20
+7
+25
+9
+29
+10
+34
+ 12
+39
+14
+44
+15
+49
+17
+54
+18
G7+16
+4
+20
+5
+24
+6
+28
+7
+34
+9
+40
+10
+47
+ 12
+54
+14
+61
+15
+69
+17
+75
+18
G8 +22
+4
+27
+5
+33
+6
+40
+7
+48
+9
+56
+10
+66
+ 12
+77
+14
+87
+15
+98
+17
+107
+18
H6+8
0
+9
0
+11
0
+13
0
+16
0
+19
0
+22
0
+25
0
+29
0
+32
0
+36
0
H7+12
0
+15
0
+18
0
+21
0
+25
0
+30
0
+35
0
+40
0
+46
0
+52
0
+57
0
H8+18
0
+22
0
+27
0
+33
0
+39
0
+46
0
+54
0
+63
0
+72
0
+81
0
+89
0
H9+30
0
+36
0
+43
0
+52
0
+62
0
+74
0
+87
0
+100
0
+115
0
+130
0
+140
0
H10+48
0
+58
0
+70
0
+84
0
+100
0
+120
0
+140
0
+160
0
+185
0
+210
0
+230
0
H11+75
0
+90
0
+110
0
+130
0
+160
0
+190
0
+220
0
+250
0
+290
0
+320
0
+360
0
J6+5
-3
+5
-4
+6
-5
+8
-5
+10
-6
+13
-6
+16
-6
+18
-7
+22
-7
+25
-7
+29
-7
J7+6
-6
+8
-7
+10
-8
+12
-9
+14
-11
+18
-12
+22
-13
+26
-14
+30
-16
+36
-16
+39
-18
J8+10
-8
+12
-10
+15
-12
+20
-13
+24
-15
+28
-18
+34
-20
+41
-22
+47
-25
+55
-26
+60
-29
JS6+4
-4
+4.5
-4.5
+5.5
-5.5
+6.5
-6.5
+8
-8
+9.5
-9.5
+11
-11
+12.5
-12.5
+14.5
-14.5
+16
-16
+18
-18
JS7+6
-6
+7.5
-7.5
+9
-9
+10.5
-10.5
+12.5
-12.5
+15
-15
+17.5
-17.5
+20
-20
+23
-23
+26
-26
+28.5
-28.5
JS8+9
-9
+11
-11
+13.5
-13.5
+16.5
-16.5
+19.5
-19.5
+23
-23
+27
-27
+31.5
-31.5
+36
-36
+40.5
-40.5
+44.5
-44.5
K6+2
-6
+2
-7
+2
-9
+2
-11
+3
-13
+4
-15
+4
-18
+4
-21
+5
-24
+5
-27
+7
-29
K7+3
-9
+5
-10
+6
-12
+6
-15
+7
-18
+9
-21
+10
-25
+12
-28
+13
-33
+16
-36
+17
-40
K8+5
-13
+6
-16
+8
-19
+10
-23
+12
-27
+14
-32
+16
-38
+20
-43
+22
-50
+25
-56
+28
-61
M6-1
-9
-3
-12
-4
-15
-4
-17
-4
-20
-5
-24
-6
-28
-8
-33
-8
-37
-9
-41
-10
-46
M70
-12
0
-15
0
-18
0
-21
0
-25
0
-30
0
-35
0
-40
0
-46
0
-52
0
-57
M8+2
-16
+1
-21
+2
-25
+4
-29
+5
-34
+5
-41
+6
-48
+8
-55
+9
-63
+9
-72
+11
-78
N6-5
-13
-7
-16
-9
-20
-11
-24
-12
-28
-14
-33
-16
-38
-20
-45
-22
-51
-25
-57
-26
-62
N7-4
-16
-4
-19
-5
-23
-7
-28
-8
-33
-9
-39
-10
-45
-12
-52
-14
-60
-14
-66
-16
-73
N8-2
-20
-3
-25
-3
-30
-3
-36
-3
-42
-4
-50
-4
-58
-4
-67
-5
-77
-5
-86
-5
-94
P6-9
-17
-12
-21
-15
-26
-18
-31
-21
-37
-26
-45
-30
-52
-36
-61
-41
-70
-47
-79
-51
-87
P7-8
-20
-9
-24
-11
-29
-14
-35
-17
-42
-21
-51
-24
-59
-28
-68
-33
-79
-36
-88
-41
-98
P8-12
-30
-15
-37
-18
-45
-22
-55
-26
-65
-32
-78
-37
-91
-43
-106
-50
-122
-56
-137
-62
-151
R6-12
-20
-16
-25
-20
-31
-24
-37
-29
-45
-35
-54
-37
-56
-44
-66
-47
-69
-56
-81
-58
-83
-61
-86
-68
-97
-71
-100
-75
-104
-85
-117
-89
-121
-97
-133
-103
-139
R7-11
-23
-13
-28
-16
-34
-20
-41
-25
-50
-30
-60
-32
-62
-38
-73
-41
-76
-48
-88
-50
-90
-53
-93
-60
-106
-63
-109
-67
-113
-74
-126
-78
-130
-87
-144
-93
-150
micrometres
OVER3 610183040506580100120140160180200225250280315355
INCLUDING610183040506580100120140160180200225250280315355 400
NOMINAL HOLE SIZES (mm)

ISO 286-2 HOLE FITS 400 - 3150 mm

NOMINAL HOLE SIZES
OVER40050063080010001250160020002500
INCLUDING5006308001000 12501600200025003150
E6+175
+135
+189
+ 145
+210
+160
+ 226
+170'
+261
+195
+298
+220
+332
+240
+360
+260
+420
+290
E7+198
+135
+215
+145
+ 240
+160
+260
+170'
+300
+195
+345
+220
+390
+240
+435
+260
+500
+290
E8+ 232
+135
+255
+145
+285
+160
+310
+170
+360
+195
+415
+220
+470
+240
+540
+260
+620
+290
E9 +290
+135
+320
+145
+360
+160
+400
+170
+455
+195
+530
+ 220
+ 610
+240
+700
+260
+830
+290
E10+385
+135
+425
+145
+480
+160
+ 530
+ 170
+615
+195
+720
+220
+840
+240
+960
+260
+1150
+290
F6+108
+68
+120
+76'
+130
+80
+142
+86]'
+164
+98
+ 188
+110
+212
+120
+240
+130
+280
+145
F7+131
+68
+146
+76'
+ 160
+80
+ 176
+86]'
+ 203
+98
+ 235
+110
+270
+120
+305
+130
+355
+145
F8+165
+68
+ 186
+76'
+205
+80
+ 226
+86]'
+263
+98
+305
+110
+350
+120
+410
+130
+475
+145
G6+60
+20
+66
+22
+74
+24
+82
+26
+94
+28
+108
+30'
+124
+32
+144
+34
+173
+38
G7+83
+20
+92
+22
+ 104
+24
+116
+26
+133
+28
+ 155
+30'
+182
+32
+209
+34
+248
+38
G8+117
+20
+132
+22
+ 149
+24
+166
+26
+193
+28
+225
+30'
+262
+32
+314
+34
+368
+38
H6+40
0
+44
0
+50
0
+56
0
+66
0
+78
0
+92
0
+110
0
+135
0
H7+63
0
+70
0
+ 80
0
+ 90
0
+105
0
+ 125
0
+150
0
+175
0
+210
0
H8+97
0
+110
0
+125
0
+140
0
+165
0
+195
0
+230
0
+ 280
0
+330
0
H9+155
0
+175
0
+200
0
+230
0
+260
0
+310
0
+370
0
+ 440
0
+540
0
H10 +250
0
+280
0
+320
0
+360
0
+420
0
+500
0
+600
0
+700
0
+860
0
H11+400
0
+ 440
0
+500
0
+560
0
+660
0
+780
0
+920
0
+1100
0
+1350
0
JS6+/-20+/-22+/-25+/-28+/-33+/-39+/-46 +/-55+/-67,5
JS7+/-31,5+/-35+/-40+/-45+/-52,5+/-62,5+/-75+/-87,5+/-105
JS8+/-48,5+/-55 +/-62,5+/-70+/-82,5+/-97,5+/-115+/-140+/-165
K6+8
-32
+ 0
-44
+ 0
-50
+ 0
- 56'
+ 0
-66
+ 0
-78
+ 0
-92
+ 0
-110
+ 0
-135
K7+18
-45
+ 0
- 70'
+ 0
-80
+ 0
- 90'
+ 0
-105
+ 0
-125
+ 0
150-
+ 0
175-
+ 0
-210
K8+ 29
-68
+ 0
-110
+ 0
-125
+ 0
-140
+ 0
-165
+ 0
-195
+ 0
-230
+ 0
-280
+ 0
-330
M6 -10
-50
-26
-70
-30
-80
-34
-90
-40
-106
-48
-126
-58
-150
-68
-178
-76
-211
M70
-63
-26
-96
-30
-110
-34
-124
-40
-145
-48
-173
-58
-208
-68
-243
-76
-286
M8+ 11
-86
-26
-136
-30
-155
-34
-174
-40
-205
-48
-243
-58
-288
-68
-348
-76
-406
N6-27
-67
-44
-88
-50
-100
-56
- 112
-66
-132
-78
-156
-92
-184
-110
- 220
-135
-270
N7-17
-80
-44
-114
-50
-130
-56
- 146
-66
-171
-78
-203
-92
-242
-110
- 285
-135
-345
N8-6
-103
-44
-154
-50
-175
-56
- 196
-66
-231
-78
-273
-92
-322
-110
-390
-135
-465
P6-55
-95
-78
-122
-88
-138
-100
-156
-120
- 186
-140
-218
-170
-262
-195
-305
-240
-375
P7-45
-108
-78
-148
-88
-168
-100
- 190
-120
-225
-140
-265
-170
-320
-195
-370
-240
-450
P8-68
-165
-78
-188
-88
-213
-100
-240
-120
- 285
-140
335-
-170
-400
-195
- 475
-240
-57
OVER40050063080010001250 160020002500
INCLUDING500630800100012501600200025003150
NOMINAL HOLE SIZES

EXTENDED RANGE FOR FASTENERS

SIZE
OVERINCLUDINGH7H8H9H11 H13H14
01+0.010
0
+0.014
0
+0.025
0
+0.060
0
+0.14
0
-
13+0.010
0
+0.014
0
+0.025
0
+0.060
0
+0.14
0
+0.25
0
36+0.012
0
+0.018
0
+0.030
0
+0.075
0
+0.18
0
+0.30
0
6 10+0.015
0
+0.022
0
+0.036
0
+0.090
0
+0.22
0
+0.36
0
1018+0.018
0
+0.027
0
+0.043
0
+0.110
0
+0.27
0
+0.43
0
1830+0.021
0
+0.033
0
+0.052
0
+0.130
0
+0.33
0
+0.52
0
3050-- --+0.39
0
+0.62
0
5080----+0.46
0
+0.74
0
80120---- +0.54
0
+0.87
0

FIT TYPES

DESCRIPTIONHOLESHAFT
Loose RunningH11c11
Free RunningH9d9
Loose RunningH11c11
Easy Running - Good quality easy to do-H8f8
SlidingH7g6
Close Clearance - Spigots and locationsH8f7
Location/ClearanceH7h6
Location- slight interferenceH7k6
Location/TransitionH7n6
Location/Interference- Press fit which can be separatedH7p6
Medium DriveH7s6
Force H7u6