Nominal diameter
Outer Diameter

Inner Diameter
Thickness t Screw's Nominal Rc Diameter of Hub Length through Hub Radius of Fillet
at Base of Hub
Dimensions
Other than BF BF Small Diameter Diameter of Hub
at large End b
Bolt
Circle Diameter C
Diameter of
Bole Holes h
Number of
Bolt Holes
Name of
Bolt Screw
10A 3/8B 75 17.8 9 9 55 12 4 M10
15 1/2 80 22.2 9 9 Rc 1/2 27 30 13 4 60 12 4 M10
20 3/4 85 27.7 10 10 Rc 3/4 33 36 15 4 65 12 4 M10
25 1 95 34.5 10 10 Rc 1 41 44 17 4 75 12 4 M10
32 1.25 115 43.2 12 12 Rc 11/4 50 53 19 4 90 15 4 M12
40 1.5 120 49.1 12 12 Rc 11/2 56 60 20 4 95 15 4 M12
50 2 130 61.1 14 14 Rc 2 69 73 24 4 105 15 4 M12
65 2.5 155 77.1 14 14 Rc 21/2 86 91 27 4 130 15 4 M12
80 3 180 90.0 14 14 Rc 3 99 105 30 4 145 19 4 M16
90 3.5 190 102.6 14 14 155 19 4 M16
100 4 200 115.4 16 16 Rc4 127 130 36 4 165 19 8 M16
125 5 235 141.2 16 16 200 19 8 M16
150 6 265 166.6 18 18 230 19 8 M16
200 8 320 218.0 20 20 280 23 8 M20
250 10 385 269.5 22 22 345 23 12 M20
300 12 430 321.0 22 22 390 23 12 M20
350 14 480 358.1 24 24 435 25 12 M22
400 16 540 409.0 24 24 495 25 16 M22
450 18 605 460.0 24 24 555 25 16 M22
500 20 655 511.0 24 24 605 25 20 M22
550 22 720 562.0 26 26 665 27 20 M24
600 24 770 613.0 26 26 715 27 20 M24
650 26 825 664.0 26 28 770 27 24 M24
700 28 875 715.0 26 30 820 27 24 M24
750 30 945 766.0 28 32 880 33 24 M30
800 32 995 817.0 28 34 930 33 24 M30
850 34 1045 868.0 28 36 980 33 24 M30
900 36 1095 919.0 30 36 1030 33 24 M30
1000 40 1195 1021.0 32 40 1130 33 28 M30