β = 15° to 30°
Point shall be chamfered or for threads ≤ M4 may be as-rolled (sheared end)
Incomplete thread u ≤ 2P
Raferee datum for dw
Maximum underhead fillet
Dimensions of IS 1364-1 Hexagon Head Bolts - Preferred Threads
Thread (d) |
M 1.6 |
M 2 |
M 2.5 |
M 3 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
pa |
0.35 |
0.4 |
0.45 |
0.5 |
0.7 |
0.8 |
1 |
1.25 |
1.5 |
b ref |
a |
9 |
10 |
11 |
12 |
14 |
16 |
18 |
22 |
26 |
b |
15 |
16 |
17 |
18 |
20 |
22 |
24 |
28 |
32 |
c |
28 |
29 |
30 |
31 |
33 |
35 |
37 |
41 |
45 |
c |
max |
0.25 |
0.25 |
0.25 |
0.40 |
0.40 |
0.50 |
0.50 |
0.60 |
0.60 |
min |
0.10 |
0.10 |
0.10 |
0.15 |
0.15 |
0.15 |
0.15 |
0.15 |
0.15 |
da max |
2 |
2.6 |
3.1 |
3.6 |
4.7 |
5.7 |
6.8 |
9.2 |
11.2 |
ds |
nom=max |
1.60 |
2.00 |
2.50 |
3.00 |
4.00 |
5.00 |
6.00 |
8.00 |
10.00 |
Product Grade |
A min |
1.46 |
1.86 |
2.36 |
2.86 |
3.82 |
4.82 |
5.82 |
7.78 |
9.78 |
B min |
1.35 |
1.75 |
2.25 |
2.75 |
3.70 |
4.70 |
5.70 |
7.64 |
9.64 |
dw |
Product Grade |
A min |
2.27 |
3.07 |
4.07 |
4.57 |
5.88 |
6.88 |
8.88 |
11.63 |
14.63 |
B min |
2.3 |
2.95 |
3.95 |
4.45 |
5.74 |
6.74 |
8.74 |
11.47 |
14.47 |
e |
Product Grade |
A min |
3.41 |
4.32 |
5.45 |
6.01 |
7.66 |
8.79 |
11.05 |
14.38 |
17.77 |
B min |
3.28 |
4.18 |
5.31 |
5.88 |
7.50 |
8.63 |
10.89 |
14.20 |
17.59 |
lf max. |
0.6 |
0.8 |
1 |
1 |
1.2 |
1.2 |
1.4 |
2 |
2 |
k |
nom. |
1.1 |
1.4 |
1.7 |
2 |
2.8 |
3.5 |
4 |
5.3 |
6.4 |
Product Grade |
A max |
1.225 |
1.525 |
1.825 |
2.125 |
2.925 |
3.65 |
4.15 |
5.45 |
6.58 |
A min |
0.975 |
1.275 |
1.575 |
1.875 |
2.675 |
3.35 |
3.85 |
5.15 |
6.22 |
Product Grade |
B max |
1.3 |
1.6 |
1.9 |
2.2 |
3.0 |
3.26 |
4.24 |
5.54 |
6.69 |
B min |
0.9 |
1.2 |
1.5 |
1.8 |
2.6 |
2.35 |
3.76 |
5.06 |
6.11 |
kwe |
Product Grade |
A min |
0.68 |
0.89 |
1.10 |
1.31 |
1.87 |
2.35 |
2.70 |
3.61 |
4.35 |
B min |
0.63 |
0.84 |
1.05 |
1.26 |
1.82 |
2.28 |
2.63 |
3.54 |
4.28 |
r min |
0.1 |
0.1 |
0.1 |
0.1 |
0.2 |
0.2 |
0.25 |
0.4 |
0.4 |
s |
nom = max |
3.20 |
4.00 |
5.00 |
5.50 |
7.00 |
8.00 |
10.00 |
13.00 |
16.00 |
Product Grade |
A min |
3.02 |
3.82 |
4.82 |
5.32 |
6.78 |
7.78 |
9.78 |
12.73 |
15.73 |
B min |
2.90 |
3.70 |
4.70 |
5.20 |
6.64 |
7.64 |
9.64 |
12.57 |
15.57 |
Product grade |
ls and lg fg |
A |
B |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
nom |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
12 |
11.65 |
12.35 |
- |
- |
1.2 |
3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
16 |
15.65 |
16.35 |
- |
- |
5.2 |
7 |
4 |
6 |
2.75 |
5 |
|
|
|
|
|
|
|
|
|
|
|
|
20 |
19.58 |
20.42 |
18.95 |
21.05 |
|
|
8 |
10 |
6.75 |
9 |
5.5 |
8 |
|
|
|
|
|
|
|
|
|
|
25 |
24.58 |
25.42 |
23.95 |
26.05 |
|
|
|
|
11.75 |
14 |
10.5 |
13 |
7.5 |
11 |
5 |
9 |
|
|
|
|
|
|
30 |
29.58 |
30.42 |
28.95 |
31.05 |
|
|
|
|
|
|
15.5 |
18 |
12.5 |
16 |
10 |
14 |
7 |
12 |
|
|
|
|
35 |
34.5 |
35.5 |
33.75 |
36.25 |
|
|
|
|
|
|
|
|
17.5 |
21 |
15 |
19 |
12 |
17 |
|
|
|
|
40 |
39.5 |
40.5 |
38.75 |
41.25 |
|
|
|
|
|
|
|
|
22.5 |
26 |
20 |
24 |
17 |
22 |
11.75 |
18 |
|
|
45 |
44.5 |
45.5 |
43.75 |
46.25 |
|
|
|
|
|
|
|
|
|
|
25 |
29 |
22 |
27 |
16.75 |
23 |
11.5 |
19 |
50 |
49.5 |
50.5 |
48.75 |
51.25 |
|
|
|
|
|
|
|
|
|
|
30 |
34 |
27 |
32 |
21.75 |
28 |
16.5 |
24 |
55 |
54.4 |
55.6 |
53.5 |
56.25 |
|
|
|
|
|
|
|
|
|
|
|
|
32 |
37 |
26.75 |
33 |
21.5 |
29 |
60 |
59.4 |
60.6 |
58.5 |
61.50 |
|
|
|
|
|
|
|
|
|
|
|
|
37 |
42 |
31.75 |
38 |
26.5 |
34 |
65 |
64.4 |
65.6 |
63.5 |
66.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
36.75 |
43 |
31.5 |
39 |
70 |
69.4 |
70.6 |
68.5 |
71.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
41.75 |
48 |
36.5 |
44 |
80 |
79.4 |
80.6 |
78.5 |
81.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
51.75 |
58 |
46.5 |
54 |
90 |
89.3 |
90.7 |
88.25 |
91.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
56.5 |
64 |
100 |
99.3 |
100.7 |
98.25 |
101.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
66.5 |
74 |
110 |
109.3 |
110.7 |
108.25 |
111.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
120 |
119.3 |
120.7 |
118.25 |
121.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Thread (d) |
M 12 |
M 16 |
M 20 |
M 24 |
M 30 |
M 36 |
M 42 |
M 48 |
M 56 |
M 64 |
pa |
1.75 |
2 |
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
6 |
b ref |
a |
30 |
38 |
46 |
54 |
66 |
- |
- |
- |
- |
- |
b |
36 |
44 |
52 |
60 |
72 |
84 |
96 |
108 |
- |
- |
c |
49 |
57 |
65 |
73 |
85 |
97 |
109 |
121 |
137 |
153 |
c |
max |
0.60 |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
1.0 |
1.0 |
1.0 |
1.0 |
min |
0.15 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.3 |
0.3 |
0.3 |
0.3 |
da max |
13.7 |
17.7 |
22.4 |
26.4 |
33.4 |
39.4 |
45.6 |
52.6 |
63 |
71 |
ds |
nom=max |
12.00 |
16.00 |
20.00 |
24.00 |
30.00 |
36.00 |
42.00 |
48.00 |
56.00 |
64.00 |
Product Grade |
A min |
11.73 |
15.73 |
19.67 |
23.67 |
- |
- |
- |
- |
- |
- |
B min |
11.57 |
15.57 |
19.48 |
23.48 |
29.48 |
35.38 |
41.38 |
47.38 |
55.26 |
63.26 |
dw |
Product Grade |
A min |
16.63 |
22.49 |
28.19 |
33.61 |
- |
- |
- |
- |
- |
- |
B min |
16.47 |
22 |
27.7 |
33.25 |
42.75 |
51.11 |
59.95 |
69.45 |
78.66 |
88.16 |
e |
Product Grade |
A min |
20.03 |
26.75 |
33.53 |
39.98 |
- |
- |
- |
- |
- |
- |
B min |
19.85 |
26.17 |
32.95 |
39.55 |
50.85 |
60.79 |
71.3 |
82.6 |
93.56 |
104.86 |
lf max. |
3 |
3 |
4 |
4 |
6 |
6 |
8 |
10 |
12 |
13 |
k |
nom. |
7.5 |
10 |
12.5 |
15 |
18.7 |
22.5 |
26 |
30 |
35 |
40 |
Product Grade |
A max |
7.68 |
10.18 |
12.715 |
15.215 |
- |
- |
- |
- |
- |
- |
A min |
7.32 |
9.82 |
12.285 |
14.785 |
- |
- |
- |
- |
- |
- |
Product Grade |
B max |
7.79 |
10.29 |
12.85 |
15.35 |
19.12 |
22.92 |
26.42 |
30.42 |
35.5 |
40.5 |
B min |
7.21 |
9.71 |
12.15 |
14.65 |
18.28 |
22.08 |
25.58 |
29.58 |
34.5 |
39.5 |
kwe |
Product Grade |
A min |
5.12 |
6.87 |
8.6 |
10.35 |
- |
- |
- |
- |
- |
- |
B min |
5.05 |
6.8 |
8.51 |
10.26 |
12.8 |
15.46 |
17.91 |
20.71 |
24.15 |
27.65 |
r min |
0.6 |
0.6 |
0.8 |
0.8 |
1 |
1 |
1.2 |
1.6 |
2 |
2 |
s |
nom = max |
18.00 |
24.00 |
30.00 |
36.00 |
46 |
55.0 |
65.0 |
75.0 |
85.0 |
95.0 |
Product Grade |
A min |
17.73 |
23.67 |
29.67 |
35.38 |
- |
- |
- |
- |
- |
- |
B min |
17.57 |
23.16 |
29.16 |
35.00 |
45 |
53.8 |
63.1 |
73.1 |
82.8 |
92.8 |
Product grade |
ls and lg fg |
A |
B |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
nom |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
50 |
49.5 |
50.5 |
- |
- |
11.25 |
20 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
55 |
54.4 |
55.6 |
53.5 |
56.5 |
16.25 |
25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
60 |
59.4 |
60.6 |
58.5 |
61.5 |
21.25 |
30 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
65 |
64.4 |
65.6 |
63.5 |
66.5 |
26.25 |
35 |
17 |
27 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
70 |
69.4 |
70.6 |
68.5 |
71.5 |
31.25 |
40 |
22 |
32 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
80 |
79.4 |
80.6 |
78.5 |
81.5 |
41.25 |
50 |
32 |
42 |
21.5 |
34 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
90 |
89.3 |
90.7 |
88.25 |
91.75 |
51.25 |
60 |
42 |
52 |
31.5 |
44 |
21 |
36 |
|
|
|
|
|
|
|
|
|
|
|
|
100 |
99.3 |
100.7 |
98.25 |
101.75 |
61.25 |
70 |
52 |
62 |
41.5 |
54 |
31 |
46 |
|
|
|
|
|
|
|
|
|
|
|
|
110 |
109.3 |
110.7 |
108.25 |
111.75 |
71.25 |
80 |
62 |
72 |
51.5 |
64 |
41 |
56 |
26.5 |
44 |
|
|
|
|
|
|
|
|
|
|
120 |
119.3 |
120.7 |
118.25 |
121.75 |
81.25 |
90 |
72 |
82 |
61.5 |
74 |
51 |
66 |
36.5 |
54 |
|
|
|
|
|
|
|
|
|
|
130 |
129.2 |
130.8 |
128 |
132 |
|
|
76 |
86 |
65.5 |
78 |
55 |
70 |
40.5 |
58 |
|
|
|
|
|
|
|
|
|
|
140 |
139.2 |
140.8 |
138 |
142 |
|
|
86 |
96 |
75.5 |
88 |
65 |
80 |
50.5 |
68 |
36 |
56 |
|
|
|
|
|
|
|
|
150 |
149.2 |
150.8 |
148 |
152 |
|
|
96 |
106 |
85.5 |
98 |
75 |
90 |
60.5 |
78 |
46 |
66 |
|
|
|
|
|
|
|
|
160 |
|
|
158 |
162 |
|
|
106 |
116 |
95.5 |
108 |
85 |
100 |
70.5 |
88 |
56 |
76 |
41.5 |
64 |
|
|
|
|
|
|
180 |
|
|
178 |
182 |
|
|
|
|
115.5 |
128 |
105 |
120 |
90.5 |
108 |
76 |
96 |
61.5 |
84 |
47 |
72 |
|
|
|
|
200 |
|
|
197.7 |
202.3 |
|
|
|
|
135.5 |
148 |
125 |
140 |
110.5 |
128 |
96 |
116 |
81.5 |
104 |
67 |
92 |
|
|
|
|
220 |
|
|
217.7 |
222.3 |
|
|
|
|
|
|
132 |
147 |
117.5 |
135 |
103 |
123 |
88.5 |
111 |
74 |
99 |
55.5 |
83 |
|
|
240 |
|
|
237.7 |
242.3 |
|
|
|
|
|
|
152 |
167 |
137.5 |
155 |
123 |
143 |
106.5 |
131 |
94 |
119 |
75.5 |
103 |
|
|
260 |
|
|
257.7 |
262.6 |
|
|
|
|
|
|
|
|
157.5 |
175 |
143 |
163 |
128.5 |
151 |
114 |
139 |
95.5 |
123 |
77 |
107 |
280 |
|
|
277.4 |
282.6 |
|
|
|
|
|
|
|
|
177.5 |
195 |
163 |
183 |
148.5 |
171 |
134 |
159 |
115.5 |
143 |
97 |
127 |
300 |
|
|
297.4 |
302.6 |
|
|
|
|
|
|
|
|
197.5 |
215 |
183 |
203 |
168.5 |
191 |
154 |
179 |
135.5 |
163 |
117 |
147 |
320 |
|
|
317.5 |
322.85 |
|
|
|
|
|
|
|
|
|
|
203 |
223 |
188.5 |
211 |
174 |
199 |
155.5 |
183 |
137 |
167 |
340 |
|
|
337.5 |
342.85 |
|
|
|
|
|
|
|
|
|
|
223 |
243 |
208.5 |
231 |
194 |
219 |
175.5 |
203 |
157 |
187 |
360 |
|
|
357.5 |
362.85 |
|
|
|
|
|
|
|
|
|
|
243 |
263 |
228.5 |
251 |
214 |
239 |
195.5 |
223 |
177 |
207 |
380 |
|
|
377.15 |
382.85 |
|
|
|
|
|
|
|
|
|
|
|
|
248.5 |
271 |
234 |
259 |
215.5 |
243 |
197 |
227 |
400 |
|
|
397.15 |
402.85 |
|
|
|
|
|
|
|
|
|
|
|
|
268.5 |
291 |
254 |
279 |
235.5 |
263 |
217 |
247 |
420 |
|
|
416.85 |
423.15 |
|
|
|
|
|
|
|
|
|
|
|
|
288.5 |
311 |
274 |
299 |
255.5 |
283 |
237 |
267 |
440 |
|
|
436.85 |
443.15 |
|
|
|
|
|
|
|
|
|
|
|
|
308.5 |
331 |
294 |
319 |
275.5 |
303 |
257 |
287 |
460 |
|
|
456.85 |
463.15 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
314 |
339 |
295.5 |
323 |
277 |
307 |
480 |
|
|
476.85 |
483.15 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
334 |
359 |
315.5 |
343 |
297 |
327 |
500 |
|
|
496.85 |
503.15 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
335.5 |
363 |
317 |
347 |
Dimensions of IS 1364-1 Non-Preferred Threads
Thread (d) |
M 3.5 |
M 14 |
M 18 |
M 22 |
M 27 |
pa |
0.6 |
2 |
2.5 |
2.5 |
3 |
b ref |
a |
13 |
34 |
42 |
50 |
60 |
b |
19 |
40 |
48 |
56 |
66 |
c |
32 |
53 |
61 |
69 |
79 |
c |
max |
0.40 |
0.60 |
0.8 |
0.8 |
0.8 |
min |
0.15 |
0.15 |
0.2 |
0.2 |
0.2 |
da max |
4.1 |
15.7 |
20.2 |
24.4 |
30.4 |
ds |
nom=max |
3.50 |
14.00 |
18.00 |
22.00 |
27.00 |
Product Grade |
A min |
3.32 |
13.73 |
17.73 |
21.67 |
- |
B min |
3.20 |
13.57 |
17.57 |
21.48 |
26.48 |
dw |
Product Grade |
A min |
5.07 |
19.64 |
25.34 |
31.71 |
- |
B min |
4.95 |
19.15 |
24.85 |
31.35 |
38 |
e |
Product Grade |
A min |
6.58 |
23.36 |
30.14 |
37.72 |
- |
B min |
6.44 |
22.78 |
29.56 |
37.29 |
45.2 |
lf max. |
1 |
3 |
3 |
4 |
6 |
k |
nom. |
2.4 |
8.8 |
11.5 |
14 |
17 |
Product Grade |
A max |
2.525 |
8.98 |
11.715 |
14.215 |
- |
A min |
2.275 |
8.62 |
11.285 |
13.785 |
- |
Product Grade |
B max |
2.6 |
9.09 |
11.85 |
14.35 |
17.35 |
B min |
2.2 |
8.51 |
11.15 |
13.65 |
16.65 |
kwe |
Product Grade |
A min |
1.59 |
6.03 |
7.9 |
9.65 |
- |
B min |
1.54 |
5.96 |
7.81 |
9.56 |
11.66 |
r min |
0.1 |
0.6 |
0.6 |
0.8 |
1 |
s |
nom = max |
6.00 |
21.00 |
27.00 |
34.00 |
41 |
Product Grade |
A min |
5.82 |
20.67 |
26.67 |
33.38 |
- |
B min |
5.70 |
20.16 |
26.16 |
33.00 |
40 |
Product grade |
ls and lg fg |
A |
B |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
ls |
lg |
nom |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
20 |
19.58 |
20.42 |
- |
- |
4 |
7 |
|
|
|
|
|
|
|
|
25 |
24.58 |
25.42 |
- |
- |
9 |
12 |
|
|
|
|
|
|
|
|
30 |
29.58 |
30.42 |
- |
- |
14 |
17 |
|
|
|
|
|
|
|
|
35 |
34.5 |
35.5 |
- |
- |
19 |
22 |
|
|
|
|
|
|
|
|
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 |
|
|
16 |
26 |
|
|
|
|
|
|
65 |
64.4 |
65.6 |
63.5 |
66.5 |
|
|
21 |
31 |
|
|
|
|
|
|
70 |
69.4 |
70.6 |
68.5 |
71.5 |
|
|
26 |
36 |
15.5 |
28 |
|
|
|
|
80 |
79.4 |
80.6 |
78.5 |
81.5 |
|
|
36 |
46 |
25.5 |
38 |
|
|
|
|
90 |
89.3 |
90.7 |
88.25 |
91.75 |
|
|
46 |
56 |
35.5 |
48 |
27.5 |
40 |
|
|
100 |
99.3 |
100.7 |
98.25 |
101.75 |
|
|
56 |
66 |
45.5 |
58 |
37.5 |
50 |
25 |
40 |
110 |
109.3 |
110.7 |
108.25 |
111.75 |
|
|
66 |
76 |
55.5 |
68 |
47.5 |
60 |
35 |
50 |
120 |
119.3 |
120.7 |
118.25 |
121.75 |
|
|
76 |
86 |
65.5 |
78 |
57.5 |
70 |
45 |
60 |
130 |
129.2 |
130.8 |
128 |
132 |
|
|
80 |
90 |
69.5 |
82 |
61.5 |
74 |
49 |
64 |
140 |
139.2 |
140.8 |
138 |
142 |
|
|
90 |
100 |
79.5 |
92 |
71.5 |
84 |
59 |
74 |
150 |
149.2 |
150.8 |
148 |
152 |
|
|
|
|
89.5 |
102 |
81.5 |
94 |
69 |
84 |
160 |
- |
- |
158 |
162 |
|
|
|
|
99.5 |
112 |
91.5 |
104 |
79 |
94 |
180 |
- |
- |
178 |
182 |
|
|
|
|
119.5 |
132 |
111.5 |
124 |
99 |
114 |
200 |
- |
- |
197.7 |
202.3 |
|
|
|
|
|
|
131.5 |
144 |
119 |
134 |
220 |
- |
- |
217.7 |
222.3 |
|
|
|
|
|
|
138.5 |
151 |
126 |
141 |
240 |
- |
- |
237.7 |
242.3 |
|
|
|
|
|
|
|
|
146 |
161 |
260 |
- |
- |
257.4 |
262.6 |
|
|
|
|
|
|
|
|
166 |
181 |
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