JIS B 1180 Standard

Nominal diamter Hexagon head screw bolts, fine, product grades A and B

Hexagon head screw bolt, fine, product grade A and B

    Notes

  • β = 15° to 30°
  • Point shall be chamfered.(see JIS B 1003).
  • Incomplete thread length at thread point u ≤ 2P.
  • Reference datum for dw.
  • de is approximately equal to the pitch diameter of the thread.
  • Permisiible shape.

Dimensions of heaxgon head bolt, fine, product grade A and B (first selection)

Unit:mm

Designation of thread d x P M8x1 M10x1 M12x1.5 M16x1.5 M20x1.5 M24x2 M30x2 M36x2 M42x3 M48x3 M56x4 M64x4
a max. 3 3 4.5 4.5 4.5 6 6 9 9 9 12 12
min 1 1 1.5 1.5 1.5 2 2 3 3 3 4 4
c max. 0.60 0.60 0.60 0.8 0.8 0.8 0.8 0.8 1.0 1.0 1.0 1.0
min. 0.15 0.15 0.15 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3
da max. 9.22 11.2 13.7 17.7 22.4 26.4 33.4 39.4 45.6 52.6 63 71
dw Product grade A min. 11.63 14.63 16.63 22.49 28.19 33.61 -- -- -- -- -- --
B 11.47 14.47 16.47 22 27.7 33.25 42.75 51.11 59.95 69.45 78.66 88.16
e Product grade A min. 14.38 17.77 20.03 26.75 33.53 39.98 -- -- -- -- -- --
B 14.2 17.59 19.85 26.17 32.95 39.55 50.85 60.79 71.3 82.6 93.56 104.86
k Reference dimensions 5.3 6.4 7.5 10 12.5 15 18.7 22.5 26 30 35 40
Product grade A max. 5.45 6.58 7.68 10.18 12.715 15.215 -- -- -- -- -- --
min. 5.15 6.22 7.32 9.82 12.285 14.785 -- -- -- -- -- --
Product grade B max. 5.54 6.69 7.79 10.29 12.85 15.35 19.12 22.92 26.42 30.42 35.5 40.5
min. 5.06 6.11 7.21 9.71 12.15 14.65 18.28 22.08 25.58 29.58 34.5 39.5
kw d) Product grade A min. 3.61 4.35 5.12 6.87 8.6 10.35 -- -- -- -- -- --
B 3.54 4.28 5.05 6.8 8.51 10.26 12.8 15.46 17.91 20.71 24.15 27.65
r min. 0.4 0.4 0.6 0.6 0.8 0.8 1 1 1.2 1.6 2 2
s Reference dimension = max. 13.00 16.00 18.00 24.50 30.00 36.00 46 55.0 65.0 75.0 85.0 95.0
Product grade A min. 12.73 15.73 17.73 23.67 29.67 35.38 -- -- -- -- -- --
B 12.57 15.57 17.57 23.16 29.16 35 45 53.8 63.1 73.1 82.8 92.8
Product grade
A B
lb)
nom.
length		 min. max. min. max.
16 15.65 16.35 -- --
20 19.58 20.42 -- --
25 24.58 25.42 -- --
30 29.58 30.42 -- --
35 34.5 35.5 -- --
40 39.5 40.5 38.75 41.25
45 44.5 45.5 43.75 46.25
50 49.5 50.5 48.75 51.25
55 54.4 55.6 53.5 56.5
60 59.4 60.6 58.5 61.5
65 64.4 65.6 63.5 66.5
70 69.4 70.6 68.5 71.5
80 79.4 80.6 78.5 81.5
90 89.3 90.7 88.25 91.75
100 99.3 100.7 98.25 101.75
110 109.3 110.7 108.25 111.75
120 119.3 120.7 118.25 121.75
130 129.2 130.8 128 132
140 139.2 140.8 138 142
150 149.2 150.8 148 152
160 -- -- 158 162
180 -- -- 178 182
200 -- -- 197.7 202.3
220 -- -- 217.7 222.3

Unit:mm

Designation of thread d x P M8 x 1 M10 x 1 M12 x 1.5 M16 x 1.5 M20 x 1.5 M24 x 2 M30 x 2 M36 x 3 M42 x 3 M48 x 3 M56 x 4 M64 x 4
Product grade
A B
l b)
nom.
length		 min. max. min. max.
240 -- -- 237.7 242.3
260 -- -- 257.4 262.6
280 -- -- 277.4 282.6
300 -- -- 297.4 302.6
320 -- -- 317.15 322.85
340 -- --- 337.15 342.85
360 -- -- 357.15 362.85
380 -- -- 377.15 382.85
400 -- -- 397.15 402.85
420 -- -- 416.85 423.15
440 -- -- 436.85 443.15
460 -- -- 456.85 463.15
480 -- -- 476.85 483.15
500 -- --- 496.85 503.15

Notes
a) kw,min = 0.7 kmin
b) The range of Prefered lengths is between the solid, bold, stepped lines:
-- for product grade A, the discontinuous, stepped lines;
-- for product grade B, below this stepped line.

Dimensions of Hexagon head screw bolt, fine, product grades A and B (second selection)

Unit:mm

Designation of thread d x p M10 x 1.25 M12 x 1.25 M14 x 1.5 M18 x 1.5 M20 x 2 M22 x 1.5 M27 x 2 M33 x 2 M39 x 3 M45 x 3 M52 x 4 M60 x 4
a max. 4 4 4.5 4.5 6 4.5 6 6 9 9 12 12
min. 1.25 1.25 1.5 1.5 2 1.5 2 2 3 3 4 4
c max. 0.60 0.60 0.60 0.8 0.8 0.8 0.8 0.8 1.0 1.0 1.0 1.0
min. 0.15 0.15 0.15 0.2 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3
da max. 11.2 13.7 15.7 20.2 22.4 24.4 30.4 36.4 42.4 48.4 56.4 67
dw Product grade A min. 14.63 16.63 19.37 25.34 28.19 31.71 -- -- -- -- -- --
B 14.47 16.47 19.15 24.85 27.7 31.35 38 46.55 55.86 64.7 74.2 83.41
e Product grade A min. 17.77 20.03 23.36 30.14 33.53 37.72 -- -- -- -- -- --
B 17.59 19.58 22.78 29.56 32.56 37.29 45.2 55.37 64.44 76.95 88.25 99.21
k Reference dimensions 6.4 7.5 8.8 11.5 12.5 14 17 21 25 28 33 38
Product grade A max. 6.58 7.68 9.98 11.715 12.715 14.715 -- -- -- -- -- --
min. 6.22 7.32 8.62 11.285 12.285 13.785 -- -- -- -- -- --
Product grade B max. 6.69 7.79 9.09 11.85 12.85 14.35 17.35 21.42 25.42 28.42 33.5 38.5
min. 6.11 7.21 8.51 11.15 12.15 13.65 16.65 20.58 24.58 27.58 32.5 37.5
kw d) Product grade A min. 4.35 5.12 6.03 7.9 8.6 9.65 -- -- -- -- -- --
B 4.28 5.05 5.96 7.81 8.51 9.56 11.66 14.41 17.21 19.31 22.75 26.25
r min. 0.4 0.6 0.6 0.6 0.8 0.8 1 1 1 1.2 1.6 2
s Reference dimension = max. 16.00 18.00 21.00 27.00 30.00 34.00 41 50 60.0 70.0 80.0 90.0
Product grade A min. 15.73 17.73 20.67 26.67 29.67 33.38 -- -- -- -- -- --
B 15.57 17.57 20.16 26.16 29.16 33.00 40 49 58.8 68.1 78.1 87.8
Designation of thread d x P M10 x 1.25 M12 x 1.25 M14 x 1.5 M18 x 1.5 M20 x 2 M22 x 1.5 M27 x 2 M33 x 2 M39 x 3 M45 x 3 M52 x 4 M60 x 4
Product grade
A B
l b)
nom.
length		 min. max. min. max.
20 19.58 20.42 -- --
25 24.58 25.42 -- --
30 29.58 30.42 -- --
35 34.5 35.5 -- --
40 39.5 40.5 -- --
45 45.5 45.5 -- --
50 49.5 50.5 -- --
55 54.4 55.6 53.5 56.5
60 59.4 60.6 58.5 61.5
65 64.4 65.6 63.5 66.5
70 69.4 70.6 68.5 71.5
80 79.4 80.6 78.5 81.5
90 89.3 90.7 88.25 91.75
100 99.3 100.7 98.25 101.75
110 109.3 110.7 108.25 111.75
120 119.3 120.7 118.25 121.75
130 129.2 130.8 128 132
140 139.2 140.8 138 142
150 149.2 150.8 148 152
160 -- -- 158 162
180 -- -- 178 182
200 -- -- 197.7 202.3
220 -- -- 217.7 222.3
240 -- -- 237.7 242.3

Unit:mm

Designation of thread d x P M10 x 1.25 M12 x 1.25 M14 x 1.5 M18 x 1.5 M20 x 2 M22 x 1.5 M27 x 2 M33 x 2 M39 x 3 M45 x 3 M52 x 4 M60 x 4
Product grade
A B
l b)
nom.
length		 min. max. min. max.
260 -- -- 257.4 262.6
260 -- -- 277.4 282.6
300 -- -- 297.4 302.6
320 -- -- 317.15 322.85
340 -- -- 337.15 342.85
360 -- -- 357.15 362.85
380 -- -- 377.15 382.85
400 -- -- 397.15 402.85
420 -- -- 416.85 423.15
440 -- -- 436.85 443.15
460 -- --- 456.85 463.15
480 -- --- 476.85 483.15
500 -- --- 496.85 503.15

Notes
a) kw,min = 0.7 kmin
b) The range of Prefered lengths is between the solid, stepped lines:
-- for product grade A, above the discontinuous, stepped lines;
-- for product grade B, below this stepped line.

Product specifications of Hexagon head screw bolts, fine, product grade A and B

Material Steel Stainless steel Non-ferrous metal
General
requirements		 Applicable standard JIS B 1099
Thread Tolerance class 6g
Applicable standard JIS B 0205-4, JIS B 0209-1
Mechanical
properties		 Property classa) d ≤ 39 mm: 5.6, 8.8, 10.9
d > 39 mm: as agreed 		d ≤ 24 mm: A2-70,
A4-70
24 mm < d ≤ 39 mm:
A2-50, A4-50
d > 39 mm: as agreed 		Material are
specified in
JIS B 1057.
Applicable standard d ≤ 39 mm: JIS B 1051
d > 39 mm: as agreed		 d ≤ 39 mm: JIS B 1054-1
d > 39 mm: as agreed
Tolerance Product grade For d ≤ 24 mm and l ≤ 10d or l ≤ 150 mm b): A
For d > 24 mm or l > 10d or l > 150 mm b) : B
Applicable standard JIS B 1021
Finish--Coating As processed
Requirements for
electroplating are specified
in JIS B 1044.
Requirements for
non-electrolytically
applied zinc flake
coatings are specified in
JIS B 1046.
 As processed As processed
Requirements for
electroplating are
specified in
JIS B 1044.
Additional requirements or other finishes or coatings shall be agreed between the purchaser and the manufacturer.
Surface intergrity Limits for surface
discontinuous are
specified in JIS B 1041 		-- --
Acceptability Acceptance inspection is specified in JIS B 1091.
Notes
a) Other property classes are specified in JIS B 1051 for steel and JIS B 1054-1 for stainless steel, respectively.
b) Whichever is the shorter.