Nominal diameter Outer Diameter
Inner Diameter d Thickness t Raised Face Screw's Nominal
Rc
Diameter of Hub Length through
Hub T
Radius of Fillet
at Base of Hub
Chamfer
Dimensions
Other than
FFC
FFC Other than
BF
BF Diameter g Height f Small Diameter Diameter of Hub
at large End b
Bolt
Diameter of
Bole Holes h
Number of
Bolt Holes
Name of
Bolt Screw
10A 3/8B 90 17.80 12 12 46 1 65 15 4 M12
15 1/2 95 22.20 23.40 12 12 51 1 Rc 1/2 27 30 16 4 3 70 15 4 M12
20 3/4 100 27.70 28.90 14 14 56 1 Rc 3/4 33 36 20 4 3 75 15 4 M12
25 1 125 34.50 35.60 14 14 67 1 Rc 1 41 44 20 4 3 90 19 4 M16
32 1.25 135 43.20 44.30 16 16 76 2 Rc 11/4 50 53 22 4 4 100 19 4 M16
40 1.5 140 49.10 50.40 16 16 81 2 Rc 11/2 56 60 24 4 4 105 19 4 M16
50 2 155 61.10 62.70 16 16 96 2 Rc 2 69 73 24 4 4 120 19 4 M16
65 2.5 175 77.10 78.70 18 18 116 2 Rc 21/2 86 91 27 4 5 140 19 4 M16
80 3 185 90.00 91.60 18 18 126 2 Rc 3 99 105 30 4 5 150 19 8 M16
90 3.5 195 102.60 104.10 18 18 136 2 160 19 8 M16
100 4 210 115.40 116.90 18 18 151 2 Rc4 127 130 36 4 5 175 19 8 M16
125 5 250 141.20 143.00 20 20 182 2 6 210 23 8 M20
150 6 280 166.60 168.40 22 22 212 2 6 240 23 8 M20
200 8 330 218.00 219.50 22 22 262 2 6 290 23 12 M20
250 10 400 269.50 271.70 24 24 324 2 6 355 25 12 M22
300 12 445 321.00 322.80 24 24 368 3 9 400 25 16 M22
350 14 490 358.10 360.20 26 26 413 3 9 445 25 16 M22
400 16 560 409.00 411.20 28 28 475 3 9 510 27 16 M24
450 18 620 460.00 462.30 30 30 530 3 9 565 27 20 M24
500 20 675 511.00 514.40 30 30 585 3 9 620 27 20 M24
550 22 745 562.00 565.20 32 34 640 3 9 680 33 20 M30
600 24 795 613.00 616.00 32 36 690 3 9 730 33 24 M30
650 26 845 664.00 34 38 740 3 780 33 24 M30
700 28 905 715.00 34 40 800 3 840 33 24 M30
750 30 970 766.00 36 44 855 3 900 33 24 M30
800 32 1020 817.00 36 46 905 3 950 33 28 M30
850 34 1070 868.00 36 48 955 3 1000 33 28 M30
900 36 1120 919.00 38 50 1005 3 1050 33 28 M30
1000 40 1235 1021.00 40 56 1110 3 1160 39 28 M36