ASME B18.2.6M

ASME B18.2.6M

ASME B18.2.6M :- Dimensions of Metric Heavy Hex Structural Bolts

Body
Diameter,
E		 AF, F AC, G Head Height,
H		 Minimum
Fillet
Radius,		 Thread
Length,		 Maximum
Transition
Thread Length,		 Maximum
Runout of
Bearing
Pitch Max. Min. Max. Min. Max. Min. Max. Min. R LT, Ref. Y, Ref. Surface FIM
M12 × 1.75 12.70 11.30 21.00 20.16 24.25 22.78 7.95 7.05 0.60 25 5.2 0.4
M16 × 2 16.70 15.30 27.00 26.16 31.18 29.56 10.75 9.25 0.60 31 6.0 0.5
M20 × 2.5 20.84 19.16 34.00 33.00 39.26 37.29 13.40 11.60 0.80 36 7.5 0.6
M22 × 2.5 22.84 21.16 36.00 35.00 41.57 39.55 14.90 13.10 0.80 38 7.5 0.6
M24 × 3 24.84 23.16 41.00 40.00 47.34 45.20 15.90 14.10 1.00 41 9.0 0.7
M27 × 3 27.84 26.16 46.00 45.00 53.12 50.85 17.90 16.10 1.20 44 9.0 0.8
M30 × 3.5 30.84 29.16 50.00 49.00 57.74 55.37 19.75 17.65 1.20 49 10.5 0.9
M36 × 4 37.00 35.00 60.00 58.80 69.28 66.44 23.55 21.45 1.50 56 12.0 1.0

GENERAL NOTE:  See Table 2 for LG and LS dimensions.

ASME B18.2.6M :- Maximum Grip Gaging Lengths and Minimum Body Lengths for Metric Heavy Hex Structural Bolts

Nominal Bolt Diameter and Thread Pitch
Nominal
Length,		 M12 × 1.75 M16 × 2 M20 × 2.5 M22 × 2.5 M24 × 3 M27 × 3 M30 × 3.5 M36 × 4
L G, L S, L G, L S, L G, L S, L G, L S, L G, L S, L G, L S, L G, L S, L G, L S,
Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min.
40 15 9.8 ... ... ... ... ... ... ... ... ... ... ... ... ... ...
45 20 14.8 14 8 ... ... ... ... ... ... ... ... ... ... ... ...
50 25 19.8 19 13 14 6.5 ... ... ... ... ... ... ... ... ... ...
55 30 24.8 24 18 19 11.5 17 9.5 ... ... ... ... ... ... ... ...
60 35 29.8 29 23 24 16.5 22 14.5 19 10 ... ... ... ... ... ...
65 40 34.8 34 28 29 21.5 27 19.5 24 15 21 12 ... ... ... ...
70 45 39.8 39 33 34 26.5 32 24.5 29 20 26 17 21 10.5 ... ...
75 50 44.8 44 38 39 31.5 37 29.5 34 25 31 22 26 15.5 ... ...
80 55 49.8 49 43 44 36.5 42 34.5 39 30 36 27 31 20.5 19 7
85 60 54.8 54 48 49 41.5 47 39.5 44 35 41 32 36 25.5 24 12
90 65 59.8 59 53 54 46.5 52 44.5 49 40 46 37 41 30.5 29 17
95 70 64.8 64 58 59 51.5 57 49.5 54 45 51 42 46 35.5 34 22
100 75 69.8 69 63 64 56.5 62 54.5 59 50 56 47 51 40.5 39 27
110 ... ... 79 73 74 66.5 72 64.5 69 60 66 57 61 50.5 44 32
120 ... ... 89 83 84 76.5 82 74.5 79 70 76 67 71 60.5 54 42
130 ... ... 99 93 94 86.5 92 84.5 89 80 86 77 81 70.5 64 52
140 ... ... 109 103 104 96.5 102 94.5 99 90 96 87 91 80.5 74 62
150 ... ... 119 113 114 106.5 112 104.5 109 100 106 97 101 90.5 84 72
160 ... ... 129 123 124 116.5 122 114.5 119 110 116 107 111 100.5 94 82
170 ... ... 139 133 134 126.5 132 124.5 129 120 126 117 121 110.5 104 92
180 ... ... 149 143 144 136.5 142 134.5 139 130 136 127 131 120.5 114 102
190 ... ... 159 153 154 146.5 152 144.5 149 140 146 137 141 130.5 124 112
200 ... ... 169 163 164 156.5 162 154.5 159 150 156 147 151 140.5 134 122
210 ... ... 179 173 174 166.5 172 164.5 169 160 166 157 161 150.5 144 132
220 ... ... 189 183 184 176.5 182 174.5 179 170 176 167 171 160.5 154 142
230 ... ... 199 193 194 186.5 192 184.5 189 180 186 177 181 170.5 164 152
240 ... ... 209 203 204 196.5 202 194.5 199 190 196 187 191 180.5 174 162
250 ... ... 219 213 214 206.5 212 204.5 209 200 206 197 201 190.5 184 172
260 ... ... 229 223 224 216.5 222 214.5 219 210 216 207 211 200.5 194 182
270 ... ... 239 233 234 226.5 232 224.5 229 220 226 217 221 210.5 204 192
280 ... ... 249 243 244 236.5 242 234.5 239 230 236 227 231 220.5 214 202
290 ... ... 259 253 254 246.5 252 244.5 249 240 246 237 241 230.5 224 212
300 ... ... 269 263 264 256.5 262 254.5 259 250 256 247 251 240.5 234 222

ASME B18.2.6M :- Dimensions of Metric Heavy Hex Nuts for Use With Structural Bolts

Pitch Width Across Flats, F Width Across Corners, G Thickness, H Maximum Total
Runout of Bearing
Max. Min. Max. Min. Max. Min. Surface FIM
M12 × 1.75 21.00 20.16 24.25 22.78 12.3 11.9 0.38
M16 × 2.00 27.00 26.16 31.18 29.56 17.1 16.4 0.47
M20 × 2.50 34.00 33.00 39.26 37.29 20.7 19.4 0.58
M22 × 2.50 36.00 35.00 41.57 39.55 23.6 22.3 0.63
M24 × 3.00 41.00 40.00 47.34 45.20 24.2 22.9 0.72
M27 × 3.00 46.00 45.00 53.12 50.85 27.6 26.3 0.80
M30 × 3.50 50.00 49.00 57.74 55.37 30.7 29.1 0.87
M36 × 4.00 60.00 58.80 69.28 66.44 36.6 35.0 1.05

ASME B18.2.6M :- Dimensions of Metric Hardened Steel Circular and Circular Clipped Washers

T
Nominal Size I.D. O.D. Standard Extra Thick Clipped Width, E, Min.
[Note (1)] Max. Min. Max. Min. Max. Min. Max. Min. [Note (2)]
12 14.4 14.0 27.0 25.7 4.6 3.1 10.0 8.0 10.5
16 18.4 18.0 34.0 32.4 4.6 3.1 10.0 8.0 14.0
20 22.5 22.0 42.0 40.4 4.6 3.1 10.0 8.0 17.5
22 24.5 24.0 44.0 42.4 4.6 3.4 10.0 8.0 19.2
24 26.5 26.0 50.0 48.4 4.6 3.4 10.0 8.0 21.0
27 30.5 30.0 56.0 54.1 4.6 3.4 10.0 8.0 23.6
30 33.6 33.0 60.0 58.1 4.6 3.4 10.0 8.0 26.2
36 39.6 39.0 72.0 70.1 4.6 3.4 10.0 8.0 31.5
42 45.6 45.0 84.0 81.8 7.2 4.6 10.0 8.0 36.7
48 52.7 52.0 95.0 92.8 7.2 4.6 10.0 8.0 42.0
56 62.7 62.0 107.0 104.8 8.7 6.1 10.0 8.0 49.0
64 70.7 70.0 118.0 115.8 8.7 6.1 10.0 8.0 56.0
72 78.7 78.0 130.0 127.5 8.7 6.1 10.0 8.0 63.0
80 86.9 86.0 142.0 139.5 8.7 6.1 10.0 8.0 70.0
90 96.9 96.0 159.0 156.5 8.7 6.1 10.0 8.0 78.7
100 107.9 107.0 176.0 173.5 8.7 6.1 10.0 8.0 87.5

GENERAL NOTE:
(1) Nominal washer sizes are intended for use with comparable nominal bolt diameters.
(2) Clipped edge, E, shall not be closer than 0.875 times the nominal bolt diameter from the center of the washer.

ASME B18.2.6M :- Dimensions for Metric Compressible Washer-Type Direct Tension Indicators

Size C Number of Protrusions E, F C Number of Protrusions E, F, A
[Note (2)] Min. Max. (Equally Spaced) Min. Max. Min. Max. (Equally Spaced) Min. Max. Min. Max. B
M12 ... ... ... ... ... ... ... ... ... ... ... ... ...
M16 35.2 36.8 4 3.2 5.5 35.2 36.8 4 3.6 6.0 16.75 16.85 25.0
M20 44.0 46.0 5 3.6 6.0 44.0 46.0 6 3.6 6.0 20.95 21.05 29.0
M22 48.4 50.6 5 3.6 6.0 48.4 50.6 6 4.0 7.0 23.05 23.15 33.0
M24 52.8 55.2 6 4.0 7.0 52.8 55.2 7 4.0 7.0 25.15 25.25 38.0
M27 59.4 62.1 6 4.0 7.0 59.4 62.1 7 4.0 7.0 28.3 28.4 43.0
M30 66.0 69.0 7 4.0 7.0 66.0 69.0 8 4.8 7.5 31.45 31.55 46.5
M36 79.2 82.8 8 4.8 7.5 79.2 82.8 9 4.8 7.5 37.75 37.85 56.0

GENERAL NOTE:
(1) Type 8.8 and Type 10.9 are intended for use on ASTM A325M and ASTM A490M bolts, respectively.
(2) Nominal direct tension indicator sizes are intended for use with fasteners of the same nominal diameter.