IS 1364-1 Hexagon Head Bolts

IS 1364-1 Hexagon Head Bolts

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
Thread (d) M 33 M 39 M 45 M 52 M 60
pa 3.5 4 4.5 5 5.5
b ref a - - - - -
b 78 90 102 116 -
c 91 103 115 129 145
c max 0.8 1.0 1.0 1.0 1.0
min 0.2 0.3 0.3 0.3 0.3
da max 36.4 42.4 48.6 56.6 67
ds nom=max 33.00 39.00 45.00 52.00 60.00
Product Grade A min - - - - -
B min 32.38 38.38 44.38 51.26 59.26
dw Product Grade A min - - - - -
B min 46.55 55.86 64.7 74.2 83.41
e Product Grade A min - - - - -
B min 55.37 66.44 76.95 88.25 99.21
lf max. 6 6 8 10 12
k nom. 21 25 28 33 38
Product Grade A max - - - - -
A min - - - - -
Product Grade B max 21.42 25.42 28.42 33.5 38.5
B min 20.58 24.58 27.58 32.5 37.5
kwe Product Grade A min - - - - -
B min 14.41 17.21 19.31 22.75 26.25
r min 1 1 1.2 1.6 2
s nom = max 50 60.0 70.0 80.00 90.0
Product Grade A min - - - - -
B min 49 58.8 68.1 78.1 87.8
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
130 129.2 130.8 128 132 34.5 52                
140 139.2 140.8 138 142 44.5 62                
150 149.2 150.8 148 152 54.5 72 40 60            
160 - - 158 162 64.5 82 50 70            
180 - - 178 182 84.5 102 70 90 55.5 78        
200 - - 197.7 202.3 104.5 122 90 110 75.5 98 59 84    
220 - - 217.7 222.3 111.5 129 97 117 82.5 105 66 91    
240 - - 237.7 242.3 131.5 149 117 137 102.5 125 86 111 67.5 95
260 - - 257.4 262.6 151.5 169 137 157 122.5 145 106 131 87.5 115
280 - - 277.4 282.6 171.5 189 157 177 142.5 165 126 151 107.5 135
300 - - 297.4 302.6 191.5 209 177 197 162.5 185 146 171 127.5 155
320 - - 317.15 322.85 211.5 229 197 217 182.5 205 166 191 147.5 175
340 - - 337.15 342.85     217 237 202.5 225 186 211 167.5 195
360 - - 357.15 362.85     237 257 222.5 245 206 231 187.5 215
380 - - 377.15 382.85     257 277 242.5 265 226 251 207.5 235
400 - - 397.15 402.85         262.5 285 246 271 227.5 255
420 - - 416.85 423.15         282.5 305 266 291 247.5 275
440 - - 436.85 443.15         302.5 325 286 311 267.5 295
460 - - 456.85 463.15             306 331 287.5 315
480 - - 476.85 483.15             326 351 307.5 335
500 - - 496.85 503.15                 327.5 355

Note :
Popular lengths are declined in term of ls and lg
for product grade A, above the dashed, stepped line;
for product grade B, below this stepped line;

  • p is the pitch of the thread.
  • For length lnom ≤ 125mm
  • For length 125mm < lnom ≤ 200mm
  • For length lnom > 200mm
  • kw.min = 0.7 kmin
  • lg.max = lnom -h
    ls, min = lg.max -5p
  • lg is the minimum grip length.

Specifications and reference standards

Material Steel Stainless steel Non-ferrous metal
General Requirements International Standard ISO 8992
Thread Tolerance 86
International Standards ISO 724, ISO 965-1
Mechanical Properties Property Classa d <3 mm: as agreed
3mm ≤ d ≤ 39 mm: 5.6, 8.8, 9.8, 10.9
d > 39 mm: as agreed 		d ≤ 24 mm: A2-70, A4-70
24mm < d ≤ 39 mm: A2-50, A4-50
d > 39 mm: as agreed		 Materials specified in ISO 8839
International Standard 3mm ≤ d ≤ 39mm : ISO 898-1
d < 3mm and d > 39mm: as agreed		 d ≤ 39mm : ISO 3506-1
d > 39mm: as agreed
Tolerances Product grade For d ≤ 24mm and l ≤ 10 d or 150mmb:A
For d > 24mm or l > 10 d or 150mmb:B
International Standard ISO 4759-1
Finish and/or coating

As Processed

Requirements for electroplating are converted in ISO 4042.

Requirements for non-electrolytically applied zinc
flake coatings are converted in ISO 10683

If different electroplating requirements are desired or if requirements are needed for other finishes,
they should be agreed between custom and supplier.

Limits for surface discontinuities are covered in ISO 6157-1

 Plain Plain
Requirements for electroplating are covered in ISO 4042.
Acceptability For acceptance procedure, see ISO 3269
a For other property classes see ISO 898-1 for steel and ISO 3506-1 for stainless steel respectively.
b Whichever is shorter.