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International Standards

Tolerances for Holes (ISO 286-2)

The importance of holes on cnc machined parts is no less than the threads.

 

 

 

ISO system of limits and fits basic hole system
Upper and Lower limits in micrometer (0.001 mm)
over up
to		 D10 E9 F7 F8 G7 G9 H6 H7 H8 H9 H11 H12 H13 JS7 JS9 K6 K7 M6 M7 N7 N9 P7 P9 R7
- 3 +60
+20		 +39
+14		 +16
+6		 +20
+10		 +12
+2		 +27
+2		 +6
0		 +10
0		 +14
0		 +25
0		 +60
0		 +100
0		 +140
0		 +5
- 5		 +12.5
-12.5		 0
-6		 0
-10		 -2
-8		 -2
-12		 -4
-14		 -4
-29		 -6
-16		 -6
-31		 -10
-20
3 6 +78
+30		 +50
+20		 +22
+10		 +28
+10		 +16
+4		 +34
+4		 +8
0		 +12
0		 +18
0		 +30
0		 +75
0		 +120
0		 +180
0		 +6
-6		 +15 
-15		 +2
-6		 +3
-9		 -1
-9		 0
-12		 -4
-16		 0
-30		 -8
-20		 -12
-42		 -11
-23
6 10 +98
+40		 +61
+25		 +28
+13		 +35
+13		 +20 
+5		 +41
+5		 +9
0		 +15
0		 +22
0		 +36
0		 +90
0		 +150
0		 +220
0		 +7.5 
-7.5		 +18
-18		 +2 
-7		 +5 
-10		 -3
-12		 0
-15		 -4
-19		 0
-36		 -9
-24		 -15
-51		 -13
-28
10 18 +120
+50		 +75
+32		 +34
+16		 +43
+16		 +24
+6		 +49
+6		 +11
0		 +18
0		 +27
0		 +43
0		 +110
0		 +180
0		 +270
0		 +9
-9		 +21.5
-21.5		 +2
-9		 +6
-12		 -4
-15		 0
-18		 -5
-23		 0
-43		 -11
-29		 -18
-61		 -16
-34
18 30 +149
+65		 +92
+40		 +41
+20		 +53
+20		 +28
+7		 +59
+7		 +13
0		 +21
0		 +33
0		 +52
0		 +130
0		 +210
0		 +330
0		 +10.5
-10.5		 +26 
-26		 +2
-11		 +6
-15		 -4
-17		 0
-21		 -7
-28		 0
-52		 -14
-35		 -22
-74		 -20
-41
30 50 +180
+80		 +112
+50		 +50 
+25		 +64 
+25		 +34 
+9		 +71
+9		 +16
0		 +25
0		 +39
0		 +62
0		 +160
0		 +250
0		 +390
0		 +12.5
-12.5		 +31
-31		 +3 
-13		 +7 
-18		 -4
-20		 0
-25		 -8
-33		 0
-62		 -17
-42		 -26
-88		 -25
-50
50 65 +220
+100		 +134
+60		 +60 
+30		 +76 
+30		 +40 
+10		   +19
0		 +30
0		 +46
0		 +74
0		 +190
0		 +300
0		 +460
0		 +15 
-15		 +37
-37		 +4 
-15		 +9 
-21		 -5
-24		 0
-30		 -9
-39		 0
-74		 -21
-51		 -32
-106		 -30
-60
65 80 +220
+100		 +134
+60		 +60 
+30		 +76 
+30		 +40 
+10		   +19
0		 +30
0		 +46
0		 +74
0		 +190
0		 +300
0		 +460
0		 +15 
-15		 +37
-37		 +4 
-15		 +9 
-21		 -5
-24		 0
-30		 -9
-39		 0
-74		 -21
-51		 -32
-106		 -32
-62
80 100 +260
+120		 +159
+72		 +71 
+36		 +90 
+36		 +47 
+12		   +22
0		 +35
0		 +54
0		 +87
0		 +220
0		 +350
0		 +540
0		 +17.5 
-17.5		 +43.5
-43.5		 +4 
-18		 +10 
-25		 -6
-28		 0
-35		 -10
-45		 0
-87		 -24
-59		 -37
-124		 -38
-73
100 120 +260
+120		 +159
+72		 +71 
+36		 +90 
+36		 +47 
+12		   +22
0		 +35
0		 +54
0		 +87
0		 +220
0		 +350
0		 +540
0		 +17.5 
-17.5		 +43.5
-43.5		 +4 
-18		 +10 
-25		 -6
-28		 0
-35		 -10
-45		 0
-87		 -24
-59		 -37
-124		 -41
-76
120 140 +305
+145		 +185
+85		 +83
+43		 +106
+43		 +54
+14		   +25
0		 +40
0		 +63
0		 +100
0		 +250
0		 +400
0		 +630
0		 +20
-20		 +50
-50		 +4
-21		 +12
-28		 -8
-33		 0
-40		 -12
-52		 0
-100		 -28
-68		 -43
-143		 -48
-88
140 160 +305
+145		 +185
+85		 +83
+43		 +106
+43		 +54
+14		   +25
0		 +40
0		 +63
0		 +100
0		 +250
0		 +400
0		 +630
0		 +20
-20		 +50
-50		 +4
-21		 +12
-28		 -8
-33		 0
-40		 -12
-52		 0
-100		 -28
-68		 -43
-143		 -50
-90
160 180 +305
+145		 +185
+85		 +83
+43		 +106
+43		 +54
+14		   +25
0		 +40
0		 +63
0		 +100
0		 +250
0		 +400
0		 +630
0		 +20
-20		 +50
-50		 +4
-21		 +12
-28		 -8
-33		 0
-40		 -12
-52		 0
-100		 -28
-68		 -43
-143		 -53
-93
180 200 +335
+170		 +215
+110		 +96
+50		 +122
+50		 +61
+15		   +29
0		 +46
0		 +72
0		 +115
0		 +290
0		 +460
0		 +720
0		 +23
-23		 +57.5
-57.5		 +5
-24		 +13
-33		 -8
-37		 0
-46		 -14
-60		 0
-115		 -33
-79		 -50
-165		 -60
-106
200 225 +335
+170		 +215
+110		 +96
+50		 +122
+50		 +61
+15		   +29
0		 +46
0		 +72
0		 +115
0		 +290
0		 +460
0		 +720
0		 +23
-23		 +57.5
-57.5		 +5
-24		 +13
-33		 -8
-37		 0
-46		 -14
-60		 0
-115		 -33
-79		 -50
-165		 -63
-109
225 250 +335
+170		 +215
+110		 +96
+50		 +122
+50		 +61
+15		   +29
0		 +46
0		 +72
0		 +115
0		 +290
0		 +460
0		 +720
0		 +23
-23		 +57.5
-57.5		 +5
-24		 +13
-33		 -8
-37		 0
-46		 -14
-60		 0
-115		 -33
-79		 -50
-165		 -67
-113
250 280 +400
+190		 +240
+110		 +108
+56		 +137
+56		 +69
+17		   +32
0		 +52
0		 +81
0		 +130
0		 +320
0		 +520
0		 +810
0		 +26
-26		 +65
-65		 +5
-27		 +16
-36		 -9
-41		 0
-52		 -14
-66		 0
-130		 -36
-88		 -56
-186		 -74
-126
280 315 +400
+190		 +240
+110		 +108
+56		 +137
+56		 +69
+17		   +32
0		 +52
0		 +81
0		 +130
0		 +320
0		 +520
0		 +810
0		 +26
-26		 +65
-65		 +5
-27		 +16
-36		 -9
-41		 0
-52		 -14
-66		 0
-130		 -36
-88		 -56
-186		 -78
-130
315 355 +440
+210		 +265
+125		 +119
+62		 +151
+62		 +75
+18		   +36
0		 +57
0		 +89
0		 +140
0		 +360
0		 +570
0		 +890
0		 +28.5
-28.5		 +70
-70		 +7
-29		 +17
-40		 -10
-46		 0
-57		 -16
-73		 0
-140		 -41
-98		 -62
-202		 -87
-144
355 400 +440
+210		 +265
+125		 +119
+62		 +151
+62		 +75
+18		   +36
0		 +57
0		 +89
0		 +140
0		 +360
0		 +570
0		 +890
0		 +28.5
-28.5		 +70
-70		 +7
-29		 +17
-40		 -10
-46		 0
-57		 -16
-73		 0
-140		 -41
-98		 -62
-202		 -93
-150

Tolerances for Shafts (ISO 286-2)

ISO system of limits and fits basic shaft system

Upper and Lower limits in micrometer (0.001 mm)
over

up

to

 d9 e8 f7 g6 h5 h6 h7 h8 h9 h11 js5 js6 js13 js14 k5 k6 m5 m6 n5 n6 p6 r6 s6 s7

-

3

 -20
-45		 -14
-28		 -6
-16		 -2
-8		 0
-4		 0
-6		 0
-10		 0
-14		 0
-25		 0
-60		 +2
-2		 +3
-3		 +70
-70		 +125
-125		 +40
0		 +60
0		 +6
+2		 +8
+2		 +8
+4		 +10
+4		 +12
+6		 +16
+10		 +20
+14		 +24
+14
3 6 -30
-60		 -20
-38		 -10
-22		 -4
-12		 0
-5		 0
-8		 0
-12		 0
-18		 0
-30		 0
-75		 +2.5
-2.5		 +4
-4		 +90
-90		 +150
-150		 +6
+1		 +9
+1		 +9
+4		 +12
+4		 +13
+8		 +16
+8		 +20
+12		 +23
+15		 +27
+19		 +31
+19
6 10 -40
-76		 -25
-47		 -13
-28		 -5
-14		 0
-6		 0
-9		 0
-15		 0
-22		 0
-36		 0
-90		 +3
-3		 +4.5
-4.5		 +110
-110		 +180
-180		 +7
+1		 +10
+1		 +12
+6		 +15
+6		 +16
+10		 +19
+10		 +24
+15		 +28
+19		 +32
+23		 +38
+23
10 18 -50
-93		 -32
-59		 -16
-34		 -6
-17		 0
-8		 0
-11		 0
-18		 0
-27		 0
-43		 0
-110		 +4
-4		 +5.5
-5.5		 +135
-135		 +215
-215		 +9
+1		 +12
+1		 +15
+7		 +18
+7		 +20
+12		 +23
+12		 +29
+18		 +34
+23		 +39
+28		 +46
+28
18 30 -65
-117		 -40
-73		 -20
-41		 -7
-20		 0
-9		 0
-13		 0
-21		 0
-33		 0
-52		 0
-130		 +4.5
-4.5		 +6.5
-6.5		 +165
-165		 +260
-260		 +11
+2		 +15
+2		 +17
+8		 +21
+8		 +24
+15		 +28
+15		 +35
+22		 +41
+28		 +48
+35		 +56
+35
30 50 -80
-142		 -50
-89		 -25
-50		 -9
-25		 0
-11		 0
-16		 0
-25		 0
-39		 0
-62		 0
-160		 +5.5
-5.5		 +8
-8		 +195
-195		 +310
-310		 +13
+2		 +18
+2		 +20
+9		 +25
+9		 +28
+17		 +33
+17		 +42
+26		 +50
+34		 +59
+43		 +68
+43
50 65 -100
-174		 -60
-106		 -30
-60		 -10
-29		 0
-13		 0
-19		 0
-30		 0
-46		 0
-74		 0
-190		 +6.5
-6.5		 +9.5
-9.5		 +230
-230		 +370
-370		 +15
+2		 +21
+2		 +24
+11		 +30
+11		 +33
+20		 +39
+20		 +51
+32		 +60
+41		 +72
+53		 +83
+53
65 80 -100
-174		 -60
-106		 -30
-60		 -10
-29		 0
-13		 0
-19		 0
-30		 0
-46		 0
-74		 0
-190		 +6.5
-6.5		 +9.5
-9.5		 +230
-230		 +370
-370		 +15
+2		 +21
+2		 +24
+11		 +30
+11		 +33
+20		 +39
+20		 +51
+32		 +62
+43		 +78
+59		 +89
+59
80 100 -120
-207		 -72
-126		 -36
-71		 -12
-34		 0
-15		 0
-22		 0
-35		 0
-54		 0
-87		 0
-220		 +7.5
-7.5		 +11
-11		 +270
-270		 +435
-435		 +18
+3		 +25
+3		 +28
+13		 +35
+13		 +38
+23		 +45
+23		 +59
+37		 +73
+51		 +93
+71		 +106
+71
100 120 -120
-207		 -72
-126		 -36
-71		 -12
-34		 0
-15		 0
-22		 0
-35		 0
-54		 0
-87		 0
-220		 +7.5
-7.5		 +11
-11		 +270
-270		 +435
-435		 +18
+3		 +25
+3		 +28
+13		 +35
+13		 +38
+23		 +45
+23		 +59
+37		 +76
+54		 +101
+79		 +114
+79
120 140 -145
-245		 -85
-148		 -43
-83		 -14
-39		 0
-18		 0
-25		 0
-40		 0
-63		 0
-100		 0
-250		 +9
-9		 +12.5
-12.5		 +315
-315		 +500
-500		 +21
+3		 +28
+3		 +33
+15		 +40
+15		 +45
+27		 +52
+27		 +68
+43		 +88
+63		 +117
+92		 +132
+92
140 160 -145
-245		 -85
-148		 -43
-83		 -14
-39		 0
-18		 0
-25		 0
-40		 0
-63		 0
-100		 0
-250		 +9
-9		 +12.5
-12.5		 +315
-315		 +500
-500		 +21
+3		 +28
+3		 +33
+15		 +40
+15		 +45
+27		 +52
+27		 +68
+43		 +90
+65		 +125
+100		 +140
+100
160 180 -145
-245		 -85
-148		 -43
-83		 -14
-39		 0
-18		 0
-25		 0
-40		 0
-63		 0
-100		 0
-250		 +9
-9		 +12.5
-12.5		 +315
-315		 +500
-500		 +21
+3		 +28
+3		 +33
+15		 +40
+15		 +45
+27		 +52
+27		 +68
+43		 +93
+68		 +133
+108		 +148
+108
180 200 -170
-285		 -100
-172		 -50
-96		 -15
-44		 0
-20		 0
-29		 0
-46		 0
-72		 0
-115		 0
-290		 +10
-10		 +14.5
-14.5		 +360
-360		 +575
-575		 +24
+4		 +33
+4		 +37
+17		 +46
+17		 +51
+31		 +60
+31		 +79
+50		 +106
+77		 +151
+122		 +168
+122
200 225 -170
-285		 -100
-172		 -50
-96		 -15
-44		 0
-20		 0
-29		 0
-46		 0
-72		 0
-115		 0
-290		 +10
-10		 +14.5
-14.5		 +360
-360		 +575
-575		 +24
+4		 +33
+4		 +37
+17		 +46
+17		 +51
+31		 +60
+31		 +79
+50		 +109
+80		 +159
+130		 +176
+130
225 250 -170
-285		 -100
-172		 -50
-96		 -15
-44		 0
-20		 0
-29		 0
-46		 0
-72		 0
-115		 0
-290		 +10
-10		 +14.5
-14.5		 +360
-360		 +575
-575		 +24
+4		 +33
+4		 +37
+17		 +46
+17		 +51
+31		 +60
+31		 +79
+50		 +113
+84		 +169
+140		 +186
+140
250 280 -190
-320		 -110
-191		 -56
-108		 -17
-49		 0
-23		 0
-32		 0
-52		 0
-81		 0
-130		 0
-320		 +11.5
-11.5		 +16
-16		 +405
-405		 +650
-650		 +27
+4		 +36
+4		 +43
+20		 +52
+20		 +57
+34		 +66
+34		 +88
+56		 +126
+94		 +190
+158		 +210
+158
280 315 -190
-320		 -110
-191		 -56
-108		 -17
-49		 0
-23		 0
-32		 0
-52		 0
-81		 0
-130		 0
-320		 +11.5
-11.5		 +16
-16		 +405
-405		 +650
-650		 +27
+4		 +36
+4		 +43
+20		 +52
+20		 +57
+34		 +66
+34		 +88
+56		 +130
+98		 +202
+170		 +222
+170
315 355 -210
-350		 -125
-214		 -62
-119		 -18
-54		 0
-25		 0
-36		 0
-57		 0
-89		 0
-140		 0
-360		 +12.5
-12.5		 +18
-18		 +445
-445		 +700
-700		 +29
+4		 +40
+4		 +46
+21		 +57
+21		 +62
+37		 +73
+37		 +98
+62		 +144
+108		 +226
+190		 +247
+190
355 400 -210
-350		 -125
-214		 -62
-119		 -18
-54		 0
-25		 0
-36		 0
-57		 0
-89		 0
-140		 0
-360		 +12.5
-12.5		 +18
-18		 +445
-445		 +700
-700		 +29
+4		 +40
+4		 +46
+21		 +57
+21		 +62
+37		 +73
+37		 +98
+62		 +150
+114		 +244
+208		 +265
+208
Thread Before and After Plating
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