ISO HOLE FIT TOLERANCES

The charts below gives the Limits and Fits for ISO 286-2 Hole Basis for holes ranging from 3mm to 400mm and 400mm to 3150mm and Fit 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)
OVER 3 6 10 18 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355
INCLUDING 6 10 18 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 400
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
M7 0
-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
OVER 3 6 10 18 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355
INCLUDING 6 10 18 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 400
NOMINAL HOLE SIZES (mm)

ISO 286-2 HOLE FITS 400 - 3150 mm

NOMINAL HOLE SIZES
OVER 400 500 630 800 1000 1250 1600 2000 2500
INCLUDING 500 630 800 1000 1250 1600 2000 2500 3150
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
M7 0
-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
OVER 400 500 630 800 1000 1250 1600 2000 2500
INCLUDING 500 630 800 1000 1250 1600 2000 2500 3150
NOMINAL HOLE SIZES

EXTENDED RANGE FOR FASTENERS

SIZE
OVER INCLUDING H7 H8 H9 H11 H13 H14
0 1 +0.010
0
+0.014
0
+0.025
0
+0.060
0
+0.14
0
-
1 3 +0.010
0
+0.014
0
+0.025
0
+0.060
0
+0.14
0
+0.25
0
3 6 +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
10 18 +0.018
0
+0.027
0
+0.043
0
+0.110
0
+0.27
0
+0.43
0
18 30 +0.021
0
+0.033
0
+0.052
0
+0.130
0
+0.33
0
+0.52
0
30 50 - - - - +0.39
0
+0.62
0
50 80 - - - - +0.46
0
+0.74
0
80 120 - - - - +0.54
0
+0.87
0

FIT TYPES

DESCRIPTION HOLE SHAFT
Loose Running H11 c11
Free Running H9 d9
Loose Running H11 c11
Easy Running - Good quality easy to do- H8 f8
Sliding H7 g6
Close Clearance - Spigots and locations H8 f7
Location/Clearance H7 h6
Location- slight interference H7 k6
Location/Transition H7 n6
Location/Interference- Press fit which can be separated H7 p6
Medium Drive H7 s6
Force H7 u6