DN outside diameter D , in mm diameter of bolt circle K , in mm diameter of bolt hole L , in mm number of bolts bolts size outside diameter of neck A , in mm bore diameters B_1 , in mm bore diameters B_2 , in mm flange thickness C_1 , in mm flange thickness C_2 , in mm flange thickness C_3 , in mm flange thickness C_4 , in mm chamfer E , in mm collar thickness F_1 , in mm collar thickness F_2 , in mm collar thickness F_3 , in mm collar thickness F_4 , in mm centre portion G_max , in mm length H_1 , in mm length H_2 , in mm length H_3 , in mm length H_4 , in mm length H_5 , in mm length H_6 , in mm neck diameters N_1 , in mm neck diameters N_2 , in mm neck diameters N_3 , in mm corner radius R_1 , in mm 10 75 50 11 4 M10 17.2 18 21 12 12 12 12 3 10 5 2 2.5 - 20 28 6 28 7 35 26 25 20 4 15 80 55 11 4 M10 21.3 22 25 12 12 12 12 3 10 5 2 2.5 - 20 30 6 30 7 38 30 30 26 4 20 90 65 11 4 M10 26.9 27.5 31 14 14 14 14 4 10 6 2.5 3 - 24 32 6 32 8 40 38 40 34 4 25 100 75 11 4 M10 33.7 34.5 38 14 14 14 14 4 10 7 2.5 3 - 24 35 6 35 10 40 42 50 44 4 32 120 90 14 4 M12 42.4 43.5 46 16 14 14 14 5 10 8 3 3 - 26 35 6 35 12 42 55 60 54 6 40 130 100 14 4 M12 48.3 49.5 53 16 14 14 14 5 10 8 3 3 - 26 38 7 38 15 45 62 70 64 6 50 140 110 14 4 M12 60.3 61.5 65 16 14 14 14 5 12 8 3 3 - 28 38 8 38 20 45 74 80 74 6 65 160 130 14 4 M12 76.1 77.5 81 16 14 14 14 6 12 8 3 3 55 32 38 9 38 20 45 88 100 94 6 80 190 150 18 4 M16 88.9 90.5 94 18 16 16 16 6 12 10 3 4 70 34 42 10 42 25 50 102 110 110 8 100 210 170 18 4 M16 114.3 116 120 18 16 16 16 6 14 10 4 4 90 40 45 10 45 25 52 130 130 130 8 125 240 200 18 8 M16 139.7 141.5 145 20 18 18 18 6 14 10 4 4 115 44 48 10 48 25 55 155 160 160 8 150 265 225 18 8 M16 168.3 170.5 174 20 18 18 18 6 14 10 5 4 140 44 48 12 48 25 55 184 185 182 10 200 320 280 18 8 M16 219.1 221.5 226 22 20 20 20 6 16 11 5 5 190 44 55 15 55 30 62 236 240 238 10 250 375 335 18 12 M16 273 276.5 281 24 22 22 22 8 18 12 8 - 235 44 60 15 60 - 68 290 295 284 12 300 440 395 22 12 M20 323.9 327.5 333 24 22 22 22 8 18 12 8 - 285 44 62 15 62 - 68 342 355 342 12 350 490 445 22 12 M20 355.6 359.5 365 26 22 22 22 8 18 13 8 - 330 - 62 15 62 - 68 385 - 392 12 400 540 495 22 16 M20 406.4 411 416 28 22 22 22 8 20 14 8 - 380 - 65 15 65 - 72 438 - 442 12 450 595 550 22 16 M20 457 462 467 30 22 22 24 8 20 15 8 - 425 - 65 15 72 - 72 492 - 494 12 500 645 600 22 20 M20 508 513.5 519 30 24 24 24 8 22 16 8 - 475 - 68 15 75 - 75 538 - 544 12 600 755 705 26 20 M24 610 616.5 622 32 30 30 30 8 22 16 - - 575 - 70 16 70 - - 640 - 642 12 700 860 810 26 24 M24 711 - 721 40 30 30 40 4 - 16 - - 670 - 76 16 70 - - 740 - 746 12 800 975 920 30 24 M27 813 - 824 44 30 30 44 4 - 16 - - 770 - 76 16 70 - - 842 - 850 12 900 1075 1020 30 24 M27 914 - 926 48 34 34 48 4 - 16 - - 860 - 78 16 70 - - 942 - 950 12 1000 1175 1120 30 28 M27 1016 - 1028 52 38 38 52 4 - 18 - - 960 - 82 16 70 - - 1045 - 1050 16 1200 1405 1340 33 32 M30 1219 - 1234 60 42 42 60 5 - 20 - - 1160 - 104 20 90 - - 1248 - 1264 16 1400 1630 1560 36 36 M33 1422 - - 72 56 56 68 - - - - - 1346 - 114 20 - - - 1452 - 1480 16 1600 1830 1760 36 40 M33 1626 - - 80 63 63 76 - - - - - 1546 - 119 20 - - - 1655 - 1680 16 1800 2045 1970 39 44 M36 1829 - - 88 69 69 84 - - - - - 1746 - 133 20 - - - 1855 - 1878 16 2000 2265 2180 42 48 M39 2032 - - 96 74 74 92 - - - - - 1950 - 146 25 - - - 2058 - 2082 16 2200 2475 2390 42 52 M39 2235 - - - 81 81 - - - - - - - - 154 25 - - - 2260 - - 18 2400 2685 2600 42 56 M39 2438 - - - 87 87 - - - - - - - - 168 25 - - - 2462 - - 18 2600 2905 2810 48 60 M45 2620 - - - 91 91 - - - - - - - - 175 25 - - - 2665 - - 18 2800 3115 3020 48 64 M45 2820 - - - 101 101 - - - - - - - - 188 30 - - - 2865 - - 18 3000 3315 3220 48 68 M45 3020 - - - 102 102 - - - - - - - - 192 30 - - - 3068 - - 18 3200 3525 3430 48 72 M45 3220 - - - 106 106 - - - - - - - - 202 30 - - - 3272 - - 20 3400 3735 3640 48 76 M45 3420 - - - 110 110 - - - - - - - - 214 35 - - - 3475 - - 20 3600 3970 3860 56 80 M52 3620 - - - 124 124 - - - - - - - - 229 35 - - - 3678 - - 20