BS 4504 / PN6

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material-composition
NOMINAL PIPE SIZE OUTSIDE DIA. (MM) DIA. OF BOLT CIRCLE (MM) DIA. OF HOLE (MM) NUMBER OF HOLE DIA. OF BORE THICKNESS MIN. (MM) CHAMFERING APPROX. WEIGHT (KG)
  D C h   do t X  
10 75 50 11 4 21 12 3  
15 80 55 11 4 25 12 3  
20 90 65 11 4 31 14 4  
25 100 75 11 4 38 14 4  
32 120 90 14 4 46 16 5  
40 130 100 14 4 53 16 5  
50 140 110 14 4 65 16 5  
65 160 130 14 4 81 16 6  
80 190 150 18 4 94 18 6  
100 210 170 18 4 120 18 6  
125 240 200 18 8 145 20 6  
150 265 225 18 8 174 20 6  
200 320 280 18 8 226 22 6  
250 375 335 18 12 281 24 8  
300 440 395 22 12 333 24 8  
350 490 445 22 12 365 26 8  
400 540 495 22 16 416 28 8  
450 595 550 22 16 467 30 8  
500 645 600 22 20 519 30 8  
600 755 705 26 20 622 32 8