List of Fit Tolerances (Excerpt from JIS B 0401)

2026/05/07

[Scope of Application]

  • JIS B 0401-1, titled "Geometric Specifications for Products—Fundamentals of Fitting," specifies ISO codes for dimensional tolerances applicable to dimensions related to the length of shapes (cylinders and two parallel planes lying opposite each other).
  • JIS B 0401-2, titled "Geometric Specifications for Products—Tolerances for Holes and Shafts," specifies the tolerance values for commonly used tolerance classes for holes and shafts, calculated from the tables defined in JIS B 0401-1.

[Tolerance Class Specifications (Display Rules)]

  1. General Tolerance classes are indicated by a combination of lowercase letters for shafts and uppercase letters for holes, which specify the basic dimensional tolerances, along with a number representing the basic size tolerance grade. [Example] H7 (hole), h7 (shaft)
  2. Dimensions and Tolerances Dimensions and tolerances are specified either by indicating the required tolerance class following the dimension shown, or by specifying the allowable deviations using the symbols + and/or −.
  3. Determining Tolerance Classes　 Tolerance classes are determined based on the fit requirements (clearance, interference).

Table of Contents

Table of Dimensional Tolerances for Holes (Dimensional Tolerances) [Excerpt from JIS B 0401]

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Hole tolerance classes E7 to H10

Unit [μm]

Dimension range
[mm]		EFGH
Exceedingor lessE7E8E9F6F7F8G6G7H5H6H7H8H9H10
36+32
+20		+38
+20		+50
+20		+18
+10		+22
+10		+28
+10		+12
+4		+16
+4		+5
0		+8
0		+12
0		+18
0		+30
0		+48
0
610+40
+25		+47
+25		+61
+25		+22
+13		+28
+13		+35
+13		+14
+5		+20
+5		+6
0		+9
0		+15
0		+22
0		+36
0		+58
0
1014+50
+32		+59
+32		+75
+32		+27
+16		+34
+16		+43
+16		+17
+6		+24
+6		+8
0		+11
0		+18
0		+27
0		+43
0		+70
0
1418
1824+61
+40		+73
+40		+92
+40		+33
+20		+41
+20		+53
+20		+20
+7		+28
+7		+9
0		+13
0		+21
0		+33
0		+52
0		+84
0
2430
3040+75
+50		+89
+50		+112
+50		+41
+25		+50
+25		+64
+25		+25
+9		+34
+9		+11
0		+16
0		+25
0		+39
0		+62
0		+100
0
4050
5065+90
+60		+106
+60		+134
+60		+49
+30		+60
+30		+76
+30		+29
+10		+40
+10		+13
0		+19
0		+30
0		+46
0		+74
0		+120
0
6580
80100+107
+72		+126
+72		+159
+72		+58
+36		+71
+36		+90
+36		+34
+12		+47
+12		+15
0		+22
0		+35
0		+54
0		+87
0		+140
0
100120
120140+125
+85		+148
+85		+185
+85		+68
+43		+83
+43		+106
+43		+39
+14		+54
+14		+18
0		+25
0		+40
0		+63
0		+100
0		+160
0
140160
160180
180200+146
+100		+172
+100		+215
+100		+79
+50		+96
+50		+122
+50		+44
+15		+61
+15		+20
0		+29
0		+46
0		+72
0		+115
0		+185
0
200225
225250
250280+162
+110		+191
+110		+240
+110		+88
+56		+108
+56		+137
+56		+49
+17		+69
+17		+23
0		+32
0		+52
0		+81
0		+130
0		+210
0
280315
315355+182
+125		+214
+125		+265
+125		+98
+62		+119
+62		+151
+62		+54
+18		+75
+18		+25
0		+36
0		+57
0		+89
0		+140
0		+230
0
355400
400450+198
+135		+232
+135		+290
+135		+108
+68		+131
+68		+165
+68		+60
+20		+83
+20		+27
0		+40
0		+63
0		+97
0		+155
0		+250
0
450500

*In each row of the table, the upper value indicates the upper dimensional tolerance, and the lower value indicates the lower dimensional tolerance.
 

Hole tolerance classes Js6 to R7

Unit [μm]

Dimension range
[mm]		JsJKMNPR
exceedor lessJs6Js7J6J7K6K7M6M7N6N7P7R7
36±4±6+5–3
 		+6+2–6
 		+3–9
 		-1-9
 		0–12
 		-5 to
13		-4-16
 		-8-20
 		-11-23
 
610±4.5±7.5+5–4
 		+8–7
 		+2–7
 		+5–10
 		-3
to -12		0-15
 		-7 to
16		-4
to 19		-9-24
 		-13-28
 
1014±5.5±9+6–5
 		+10–8
 		+2–9
 		+6–12
 		-4-15
 		0-18
 		-9 to 20
 		-5-23
 		Nov
. 29		-16-34
 
1418
1824±6.5±10.5+8–5
 		+12–9
 		+2–11
 		+6–15
 		-4–17
 		0–21
 		-11-24
 		-7-28
 		-14-35
 		-20-41
 
2430
3040±8±12.5+10–6
 		+14–11
 		+3–13
 		+7–18
 		-4 to
20		0–25
 		-12-28
 		-8
to 33		-17-42
 		-25-50
 
4050
5065±9.5±15+13–6
 		+18–12
 		+4–15
 		+9–21
 		-5 to
-24		0–30
 		-14 to
-33		-9-39
 		-21-51
 		-30-60
 
6580-32-62
 
80100±11±17.5+16-6
 		+22–13
 		+4–18
 		+10–25
 		-6 to
-28		0–35
 		-16 to
-38		-10 to
-45		-24-59
 		-38-73
 
100120-41-76
 
120140±12.5±20+18–7
 		+26–14
 		+4–21
 		+12–28
 		-8 to
-33		0–40
 		-20 to
-45		-12-52
 		-28-68
 		-48-88
 
140160-50-90
 
160180-53-93
 
180200±14.5±23+22-7
 		+30–16
 		+5–24
 		+13–33
 		-8-37
 		0–46
 		-22-51
 		-14-60
 		-33-79
 		-60-106
 
200225-63-109
 
225250-67-113
 
250280±16±26+25-7
 		+36–16
 		+5–27
 		+16–36
 		-9-41
 		0–52
 		-25-57
 		-14-66
 		-36-88
 		-74-126
 
280315-78-130
 
315355±18±28.5+29-7
 		+39-18
 		+7–29
 		+17–40
 		-10 to
-46		0-57
 		-26-62
 		-16 to
-73		-41 to
-98		-87-144
 
355400-93-150
 
400450±20±31.5+33-7
 		+43-20
 		+8–32
 		+18–45
 		-10 to
50		0–63
 		-27
to 67		-17
to 80		-45 to
108		-103-166
 
450500-109-172
 

*In each row of the table, the top number indicates the upper dimensional tolerance, and the bottom number indicates the lower dimensional tolerance.
 

Table of Dimensional Tolerances for Shafts (Dimensional Tolerances) [Excerpt from JIS B 0401]

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Shaft tolerance classes d8 to h9


Unit [μm]

Dimension range
[mm]		defgh
exceedor lessd8d9e7e8e9f6f7f8g5g6h5h6h7h8h9
36-30-48
 		-30-60
 		-20-32
 		-20-38
 		-20-50
 		-10-18
 		-10-22
 		-10-28
 		-4-9
 		-4-12
 		0-5
 		0-8
 		0-12
 		0-18
 		0-30
 
610-40
-62		-40-76
 		-25-40
 		-25-47
 		-25-61
 		-13-22
 		-13-28
 		-13-35
 		-5-11
 		-5-14
 		0-6
 		0-9
 		0-15
 		0-22
 		0-36
 
1014-50
-77		-50-93
 		-32-50
 		-32-59
 		-32-75
 		-16-27
 		-16-34
 		-16-43
 		-6-14
 		-6-17
 		0-8
 		0-11
 		0-18
 		0-27
 		0-43
 
1418
1824-65-98
 		-65-117
 		-40-61
 		-40-73
 		-40-92
 		-20-33
 		-20-41
 		-20-53
 		-7-16
 		-7-20
 		0-9
 		0-13
 		0-21
 		0-33
 		0-52
 
2430
3040-80-119
 		-80-142
 		-50-75
 		-50-89
 		-50-112
 		-25-41
 		-25-50
 		-25-64
 		-9-20
 		-9-25
 		0-11
 		0–16
 		0-25
 		0-39
 		0-62
 
4050
5065-100-146
 		-100-174
 		-60-90
 		-60-106
 		-60-134
 		-30-49
 		-30-60
 		-30-76
 		-10-23
 		-10-29
 		0-13
 		0-19
 		0-30
 		0-46
 		0-74
 
6580
80100-120-174
 		-120-207
 		-72-107
 		-72-126
 		-72-159
 		-36-58
 		-36-71
 		-36-90
 		-12-27
 		-12-34
 		0-15
 		0-22
 		0-35
 		0-54
 		0-87
 
100120
120140-145-208
 		-145-245
 		-85-125
 		-85-148
 		-85-185
 		-43-68
 		-43-83
 		-43-106
 		-14-32
 		-14-39
 		0-18
 		0-25
 		0-40
 		0-63
 		0-100
 
140160
160180
180200-170-242
 		-170-285
 		-100-146
 		-100-172
 		-100-215
 		-50-79
 		-50-96
 		-50-122
 		-15-35
 		-15-44
 		0-20
 		0-29
 		0-46
 		0–72
 		0-115
 
200225
225250
250280-190-271
 		-190-320
 		-110-162
 		-110-191
 		-110-240
 		-56-88
 		-56-108
 		-56-137
 		-17-40
 		-17-49
 		0-23
 		0-32
 		0-52
 		0-81
 		0-130
 
280315
315355-210–299
 		-210-350
 		-125-182
 		-125-214
 		-125-265
 		-62-98
 		-62-119
 		-62-151
 		-18-43
 		-18-54
 		0-25
 		0-36
 		0-57
 		0-89
 		0-140
 
355400
400450-230-327
 		-230-385
 		-135-198
 		-135-232
 		-135-290
 		-68-108
 		-68-131
 		-68-165
 		-20-47
 		-20-60
 		0-27
 		0-40
 		0-63
 		0-97
 		0-155
 
450500

*In each row of the table, the upper value indicates the upper dimensional tolerance, and the lower value indicates the lower dimensional tolerance.
 

Shaft tolerance classes: Js5 to R6

Unit [μm]

Dimension range
[mm]		jsjkmnpr
exceedor lessjs5js6js7j5j6k5k6m5m6n6p6r6
36±2.5±4±6+3–2
 		+6–2
 		+6
+1		+9
+1		+9
+4		+12
+4		+16
+8		+20
+12		+23
+15
610±3±4.5±7.5+4–2
 		+7–2
 		+7
+1		+10
+1		+12
+6		+15
+6		+19
+10		+24
+15		+28
+19
1014±4±5.5±9+5–3
 		+8–3
 		+9
+1		+12
+1		+15
+7		+18
+7		+23
+12		+29
+18		+34
+23
1418
1824±4.5±6.5±10.5+5–4
 		+9–4
 		+11
+2		+15
+2		+17
+8		+21
+8		+28
+15		+35
+22		+41
+28
2430
3040±5.5±8±12.5+6–5
 		+11–5
 		+13
+2		+18
+2		+20
+9		+25
+9		+33
+17		+42
+26		+50
+34
4050
5065±6.5±9.5±15+6–7
 		+12–7
 		+15
+2		+21
+2		+24
+11		+30
+11		+39
+20		+51
+32		+60
+41
6580+62
+43
80100±7.5±11±17.5+6–9
 		+13–9
 		+18
+3		+25
+3		+28
+13		+35
+13		+45
+23		+59
+37		+73
+51
100120+76
+54
120140±9±12.5±20+7–11
 		+14–11
 		+21
+3		+28
+3		+33
+15		+40
+15		+52
+27		+68
+43		+88
+63
140160+90
+65
160180+93
+68
180200±10±14.5±23+7–13
 		+16–13
 		+24
+4		+33
+4		+37
+17		+46
+17		+60
+31		+79
+50		+106
+77
200225+109
+80
225250+113
+84
250280±11.5±16±26+7–16
 		±16+27
+4		+36
+4		+43
+20		+52
+20		+66
+34		+88
+56		+126
+94
280315+130
+98
315355±12.5±18±28.5+7–18
 		±18+29
+4		+40
+4		+46
+21		+57
+21		+73
+37		+98
+62		+144
+108
355400+150
+114
400450±13.5±20±31.5+7–20
 		±20+32
+5		+45
+5		+50
+23		+63
+23		+80
+40		+108
+68		+166
+126
450500+172
+132

*In each row of the table, the top number indicates the upper dimensional tolerance, and the bottom number indicates the lower dimensional tolerance.
 

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