Nominal size
mm
Fundamental deviation values
Upper limit deviation, ES
Above
Up to
and
including
Up to
and
including
IT8
Above
IT8
Up to and
including
IT7
Standard tolerance grades above IT7
Na,b
P to ZCa
P  
R  
S  
T  
V
    Y      ZA 
ZB 
ZC
-
3
-4
-4
Values as
for standard
tolerance grades
above IT7
increased by ∆
-6
-10
-14
 
-18
 
-20
 
-26
-32
-40
-60
3
6
 
-  8 + 4
0
-12
-15
-19
 
-23
 
-28
 
-35
-42
-50
-80
6
10
 
-  10 + 4
0
-15
-19
-23
 
-28
 
-34
 
-42
-52
-67
-97
10
14
 
-  12 + 4
0
-18
-23
-28
 
-33
 
-40
 
-50
-64
-90
-130
14
18
-39
-45
 
-60
-77
-108
-150
18
24
 
-  15 + 4
0
-22
-28
-35
 
-41
-47
-54
-63
-73
-98
-136
-188
24
30
-41
-48
-55
-64
-75
-88
-118
-160
-218
30
40
 
-  17 + 4
0
-26
-34
-43
-48
-60
-68
-80
-94
-112
-148
-200
-274
40
50
-54
-70
-81
-97
-114
-136
-180
-242
-325
50
65
 
-  20 + 4
0
-32
-41
-53
-66
-87
-102
-122
-144
-172
-226
-300
-405
65
80
-43
-59
-75
-102
-120
-146
-174
-210
-274
-360
-480
80
100
 
-  23 + 4
0
-37
-51
-71
-91
-124
-146
-178
-214
-258
-335
-445
-585
100
120
-54
-79
-104
-144
-172
-210
-254
-310
-400
-525
-690
120
140
 
-  27 + 4
0
-43
-63
-92
-122
-170
-202
-248
-300
-365
-470
-620
-800
140
160
-65
-100
-134
-190
-228
-280
-340
-415
-535
-700
-900
160
180
-68
-108
-146
-210
-252
-310
-380
-465
-600
-780
-1000
180
200
 
-  31 + 4
0
-50
-77
-122
-166
-236
-284
-350
-425
-520
-670
-880
-1150
200
225
-80
-130
-180
-258
-310
-385
-470
-575
-740
-960
-1250
225
250
-84
-140
-196
-284
-340
-425
-520
-640
-820
-1050
-1350
250
280
 
-  34 + 4
0
-56
-94
-158
-218
-315
-385
-475
-580
-710
-920
-1200
-1550
280
315
-98
-170
-240
-350
-425
-525
-650
-790
-1000
-1300
-1700
315
355
 
-  37 + 4
0
-62
-108
-190
-268
-390
-475
-590
-730
-900
-1150
-1500
-1900
355
400
-114
-208
-294
-435
-530
-660
-820
-1000
-1300
-1650
-2100
400
450
 
-  40 + 4
0
-68
-126
-232
-330
-490
-595
-740
-920
-1100
-1450
-1850
-2400
450
500
-132
-252
-360
-540
-660
-820
-1000
-1250
-1600
-2100
-2600


a.For determining the values N and P to ZC, see  Establishment of limit deviations using ∆-values (EN ISO 286-1)
b.Fundamental deviations N for standard tolerance gradesabove IT8 shall not be used for nominal sizes ≤1 mm.

Nominal size
mm
Fundamental deviation values and ∆ values in micrometres
Above
Up to
and
including
Up to
and
including
IT8
Above
IT8
Up to and
including
IT7
Standard tolerance grades above IT7
Na,b
P to ZCa
P  
R  
S  
T  
500
560
-44
Values as 
for standard 
tolerance grades 
above IT7 
increased by ∆
-78
-150
-280
-400
-600
560
630
-155
-310
-450
-660
630
710
-50
-88
-175
-340
-500
-740
710
800
-185
-380
-560
-840
800
900
-56
-100
-210
-430
-620
-940
900
1000
-220
-470
-680
-1050
1000
1120
-66
-120
-250
-520
-780
-1150
1120
1250
-260
-580
-840
-1300
1250
1400
-78
-140
-300
-640
-960
-1450
1400
1600
-330
-720
-1050
-1600
1600
1800
-92
-170
-370
-820
-1200
-1850
1800
2000
-400
-920
-1350
-2000
2000
2240
-110
-195
-440
-1000
-1500
-2300
2240
2500
-460
-1100
-1650
-2500
2500
2800
-135
-240
-550
-1250
-1900
-2900
2800
3150
-580
-1400
-2100
-3200

a.For determining the values N and P to ZC, see  Establishment of limit deviations using ∆-values (EN ISO 286-1)
b.Fundamental deviations N for standard tolerance gradesabove IT8 shall not be used for nominal sizes ≤1 mm.

Tags: EN ISO 286-1 fundamental deviations for holes N to ZC