JIS B 1189 Standard

Bolts--bolts with full shank (standard type)

Bolts--bolts with full shank (standard type)

Bolts--bolts with reduced shank, type R (upon request)

Bolts--bolts with reduced shank, type R (upon request)

Bolts--profiles of underhead (bearing surface area)

Bolts--profiles of underhead (bearing surface area)

    Notes
  • The top of the head shall be either full form or indented at the manufacturer's discretion and shall be either chamfered or rounded. The minimum diameter of the chamfer circle or start of rounding shall be the maximum width across flats minus 15 %. If the top of the head is indented, the periphery may be rounded.
  • Edge contour optional.
  • Chamfered end (See JIS B 1003).
  • b = 15° to 30°
  • kw is the wrenching height; see the note to attached table 1.1.
  • Incomplete thread u ≤ 2P.
  • Rounded, chamfered or conical.
  • db is approximately equal to the pitch diameter (rolling diameter).
  • c is measured at dw.min
  • δ = 15° to 25°.
  • Maximum and minimum underhead fillet.
  • Junction of fillet with bearing surface to be a smooth blend.
Note : For other dimensions, see attached figure 1.1.

Dimensions of Bolts--course thread--product grade A

Unit:mm

Designation of thread
(d)		 M5 M6 M8 M10 M12 (M14)(13) M16
P(14) 0.8 1 1.25 1.5 1.75 2 2
b(ref) (15) 16 18 22 26 30 34 38
(16) -- -- 28 32 36 40 44
(17) -- -- -- -- -- -- 57
c min. 1 1.1 1.2 1.5 1.8 2.1 2.4
da Type F max. 5.7 6.8 9.2 11.2 13.7 15.7 17.7
Type U 6.2 7.5 10 12.5 15.2 17.7 20.5
dc max. 11.4 13.6 17 20.8 24.7 28.6 32.8
ds max. 5.00 6.00 8.00 10.00 12.00 14.00 16.00
min. 4.82 5.82 7.78 9.78 11.73 13.73 15.73
dv max. 5.5 6.6 8.8 10.8 12.8 14.8 17.2
dw min. 9.4 11.6 14.9 18.7 22.5 26.4 30.6
e min. 7.59 8.71 10.95 14.26 16.5 19.86 23.15
k max. 5.6 6.9 8.5 9.7 12.1 12.9 15.2
kw min. 2.3 2.9 3.8 4.3 5.4 5.6 6.8
lr max. 1.4 1.6 2.1 2.1 2.1 2.1 3.2
r1 min. 0.2 0.25 0.4 0.4 0.6 0.6 0.6
r2(18) max. 0.3 0.4 0.5 0.6 0.7 0.9 1
r3 max. 0.25 0.26 0.36 0.45 0.54 0.63 0.72
min. 0.10 0.11 0.16 0.20 0.24 0.28 0.32
r4 (ref.) 4 4.4 5.7 5.7 5.7 5.7 8.8
s max. 7.00 8.00 10.00 13.00 15.00 18.00 21.00
min. 6.78 7.78 9.78 12.73 14.73 17.73 20.67
v max. 0.15 0.20 0.25 0.30 0.35 0.45 0.50
min. 0.05 0.05 0.10 0.15 0.15 0.20 0.2.5
l(19)(20) ls and lg(21)
nom.
length		 min. max. ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.
10 9.71 10.29 --

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12 11.65 12.35
16 15.65 16.35
20 19.58 20.42 -- -- -- -- -- -- -- --
25 24.58 25.42 5 9 -- -- -- -- -- -- -- --
30 29.58 30.42 10 14 7 12 -- -- -- -- -- -- -- --
35 34.5 35.5 15 19 12 17 6.75 13 -- -- -- -- -- -- -- --
40 39.5 40.5 20 24 17 22 11.75 18 6.5 14 -- -- -- -- -- --
45 44.5 45.5 25 29 22 27 16.75 23 11.5 19 6.25 15 -- -- -- --
50 49.5 50.5 30 34 27 32 21.75 28 16.5 24 11.25 20 6 16 -- --
55 54.4 55.6 32 37 26.75 33 21.5 29 16.25 25 11 21 7 17
60 59.4 60.6 37 42 31.75 38 26.5 34 21.25 30 16 26 12 22
65 64.4 65.6 36.75 43 31.5 39 26.25 35 21 31 17 27
70 69.4 70.6 41.75 48 36.5 44 31.25 40 26 36 22 32
80 79.4 80.6 51.75 58 46.5 54 41.25 50 36 46 32 42
90 89.3 90.7 56.5 64 51.25 60 46 56 42 52
100 99.3 100.7 66.5 74 61.25 70 56 66 52 62
110 109.3 110.7 71.25 80 66 76 62 72
120 119.3 120.7 81.25 90 76 86 72 82
130 129.2 130.8 80 90 76 86
140 139.2 140.8 90 100 86 96
150 149.2 150.8 96 106
160 159.2 160.8 106 116

    Notes

  • The Size in Parentheses should be avoided if possible.
  • P is the pitch of the thread
  • For Lengths lnom ≤ 125 mm.
  • For Lengths 125 mm < lnom ≤ 200 mm.
  • Radius r2 applies at the junction of the hexagon portion (both opposite side and opposite angle)
    and the flangew part.
  • Screws with lengths shown above the thick stepped line are threaded to head.
  • reduced shank type (type R) onky below the dashed stepped line.
  • lg is the minimum grip length.

Note: If the product passes the gauging in annex A, the requirements for dimensions c, e and kw are satisfied.

Product specfication of bolts--coarse thread-- product grade A

Material Steel Stainless Steel
Thread Tolerance                                                  6G
Applicable standards                                                  JIS B 0205-2, JIS 0209-2
Mechanical properties Class 8.8, 9.8, 10.9 A2-70
Applicable standards JIS B 1051 JIS B 1054-1
Tolerance Product grade                                                  A
Applicable standards                                                  JIS B 1021
Finish Black Oxide (thermic or chemical)
Requriments for electroplating are
covered in JIS B 1044.		 Plain
If different electroplating requirements are desired of if requirements are needed for other finishes,
they should be negotiated between customer and supplier
Limits for surface discontinuties are
covered in JIS B 1043. 		---
Acceptability For acceptance procedure, see JIS B 1091

Designation of products (coarse thread)

Example
Product A hexagon bolt with flange, small series, product grade A, with thread M12,
nominal length l=80 mm, type F or U at the option of the manufacturer, and
property class 8.8 is designated as follows:
Designation Hexagon bolt with flange - JIS B 1189 - ISO 15071 - M12 x 80 - 8.8
Product A hexagon bolt with flange, small series, product grade A, with thread M12, nominal length l = 80 mm, type F, and property class 8.8 is designated as follows:
Designation Hexagon bolt with flange - JIS B 1189 - ISO 15071 - M12 x 80 - F - 8.8
Product If, in special cases, a hexagon bolt with flange with reduced shank is required, the letter R shall be included in the desgination
Designation Hexagon bolt with flange - JIS B 1189 - ISO 15071 - M12 x 80 - R - 8.8

Note: Attached figure 1.1 to attached figure 1.3 and attached table 1.1 to attached table 1.3 are identical with those in ISO 10571 : 1999.

JIS B 1189 Hex Flange Bolts Bolts--fine pitch thread-- threaded to the head

Bolts--fine pitch thread--threaded to the head

Dimensions of bots-fine pitch thread--product grade A

Designation of thread
d x p(14)		 M8 x 1 M10 x 1
M10 x 1.25		 M12 x 1.25
M12 x 1.5		 (M14 x 1.5)(13) M16 x 1.5
a max. 3 3 4.5 4.5 4.5
min. 1 1 1.5 1.5 1.5
b (ref.) (15) 22 26 30 34 38
(16) 28 32 36 40 44
(17) -- -- -- -- 57
c min. 1.2 1.5 1.8 2.1 2.4
da Type F max. 9.2 11.2 13.7 15.7 17.7
Type U 10 12.5 15.2 17.7 20.5
dc max. 17 20.8 24.7 28.6 32.8
dw min. 14.9 18.7 22.5 26.4 30.6
e min. 10.95 14.26 16.5 19.86 23.15
k max. 8.5 9.7 12.1 12.9 15.2
kw min. 3.8 4.3 5.4 5.6 6.8
lf max. 2.1 2.1 2.1 2.1 3.2
r1 min. 0.4 0.4 0.6 0.6 0.6
r2(18) max. 0.5 0.6 0.7 0.9 1
r3 max. 0.36 0.45 0.54 0.63 0.72
min. 0.16 0.20 0.24 0.28 0.32
r4 (ref.) 5.7 5.7 5.7 5.7 8.8
s max. 10.00 13.00 15.00 18.00 21.00
min. 9.78 12.73 14.73 17.73 20.67
v max. 0.25 0.30 0.35 0.45 0.50
min. 0.10 0.15 0.15 0.20 0.25
l(19)(20) ls and lg(21)(22)
nom.
length		 min. max. ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.		 ls
min.		 lg
max.
16 15.65 16.35 -- --
20 19.58 20.42 --

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25 24.58 25.42
30 29.58 30.42
35 34.5 35.5 6.75 13 -- -- -- -- --

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40 39.5 40.5 11.75 18 65 14 -- --
45 44.5 45.5 16.75 23 11.5 19 6.25 15
50 49.5 50.5 21.75

26.75

31.75		 28

33

38		 16.5

21.5

26.5		 24

29

30		 11.25

16.25

21.25		 20

25

30		 6

11

16		 16

21

26		 --

21

26		 --

17

22
55 54.4 55.6
60 59.4 60.6
65 64.4 65.6 36.75

41.75

51.75		 43

48

58		 31.5

36.5

46.5		 39

44

54		 26.25

31.25

41.25		 35

40

50		 21

26

36		 31

36

46		 17

22

32		 27

32

42
70 69.4 70.6
80 79.4 80.6
90 89.3 90.7 56.5

66.5

 		 64

74

 		 51.25

61.25

71.25		 60

70

80		 46

56

66		 56

66

76		 42

52

62		 52

62

72
100 99.3 100.7
110 109.3 110.7
120 119.3 120.7 81.25

 

 		 90

 

 		 76

80

90		 86

90

100		 72

76

86		 82

86

96
130 129.2 130.8
140 139.2 140.8
150 149.2 150.8 96

106		 106

116
160 159.2 160.8

    Notes

  • The Size in Parentheses should be avoided if possible.
  • P is the pitch of the thread
  • For Lengths lnom ≤ 125 mm.
  • For Lengths 125 mm < lnom ≤ 200 mm.
  • Radius r2 applies at the junction of the hexagon portion (both opposite side and opposite angle)
    and the flangew part.
  • Screws with lengths shown above the thick stepped line are threaded to head.
  • reduced shank type (type R) onky below the dashed stepped line.
  • lg is the minimum grip length.

Note: If the product passes the gauging in annex A, the requirements for dimensions c, e and kw are satisfied.

Product specfication of bolts--Fine Pitch thread-- product grade A

Material Steel Stainless Steel
Thread Tolerance                                                  6G
Applicable standards                                                  JIS B 0205-2, JIS 0209-2
Mechanical properties Class 8.8, 9.8, 10.9, 12.9 A2-70
Applicable standards JIS B 1051 JIS B 1054-1
Tolerance Product grade                                                  A
Applicable standards                                                  JIS B 1021
Finish Black Oxide (thermic or chemical)
Requriments for electroplating are
covered in JIS B 1044.		 Plain
If different electroplating requirements are desired of if requirements are needed for other finishes,
they should be negotiated between customer and supplier
Limits for surface discontinuties are
covered in JIS B 1043. 		---
Acceptability For acceptance procedure, see JIS B 1091

Designation of products (Fine Pitch thread)

Example
Product A hexagon bolt with flange, small series, product grade A, with thread M12,
nominal length l=80 mm, type F or U at the option of the manufacturer, and
property class 8.8 is designated as follows:
Designation Hexagon bolt with flange - JIS B 1189 - ISO 15071 - M12 x 80 - 8.8
Product A hexagon bolt with flange, small series, product grade A, with thread M12, nominal length l = 80 mm, type F, and property class 8.8 is designated as follows:
Designation Hexagon bolt with flange - JIS B 1189 - ISO 15071 - M12 x 80 - F - 8.8
Product If, in special cases, a hexagon bolt with flange with reduced shank is required, the letter R shall be included in the desgination
Designation Hexagon bolt with flange - JIS B 1189 - ISO 15071 - M12 x 80 - R - 8.8

Note: Attached figure 1.1 to attached figure 1.3 and attached table 1.1 to attached table 1.3 are identical with those in ISO 10572 : 1999.