• Industry Standard Class 125-150 Blind Flange
  • All dimensions are in inches.
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Item #

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Approximate Weight (lbs)

Number of Bolt Holes

Diameter of Bolt Holes

Diameter of Bolt Circle (C)

N/A 4 N/A 9.00 N/A 0.500 N/A 10 N/A 8 N/A 0.750 N/A 7.50
N/A 5 N/A 10.00 N/A 0.562 N/A 12 N/A 8 N/A 0.875 N/A 8.50
N/A 6 N/A 11.00 N/A 0.562 N/A 15 N/A 8 N/A 0.875 N/A 9.50
N/A 8 N/A 13.50 N/A 0.562 N/A 22 N/A 8 N/A 0.875 N/A 11.75
N/A 10 N/A 16.00 N/A 0.688 N/A 37 N/A 12 N/A 1.000 N/A 14.25
N/A 12 N/A 19.00 N/A 0.688 N/A 54 N/A 12 N/A 1.000 N/A 17.00
N/A 14 N/A 21.00 N/A 0.750 N/A 71 N/A 12 N/A 1.125 N/A 18.75
N/A 16 N/A 23.50 N/A 0.750 N/A 89 N/A 16 N/A 1.125 N/A 21.25
N/A 18 N/A 25.00 N/A 0.750 N/A 100 N/A 16 N/A 1.250 N/A 22.75
N/A 20 N/A 27.50 N/A 0.750 N/A 121 N/A 20 N/A 1.250 N/A 25.00
N/A 22 N/A 29.50 N/A 1.000 N/A 185 N/A 20 N/A 1.375 N/A 27.25
N/A 24 N/A 32.00 N/A 1.000 N/A 220 N/A 20 N/A 1.375 N/A 29.50
N/A 26 N/A 34.25 N/A 1.000 N/A 251 N/A 24 N/A 1.375 N/A 31.75
N/A 28 N/A 36.50 N/A 1.000 N/A 285 N/A 28 N/A 1.375 N/A 34.00
N/A 30 N/A 38.75 N/A 1.000 N/A 322 N/A 28 N/A 1.375 N/A 36.00
N/A 32 N/A 41.75 N/A 1.125 N/A 418 N/A 28 N/A 1.625 N/A 38.50
N/A 34 N/A 43.75 N/A 1.125 N/A 458 N/A 32 N/A 1.625 N/A 40.50
N/A 36 N/A 46.00 N/A 1.125 N/A 508 N/A 32 N/A 1.625 N/A 42.75
N/A 38 N/A 48.75 N/A 1.125 N/A 575 N/A 32 N/A 1.625 N/A 45.25
N/A 40 N/A 50.75 N/A 1.125 N/A 620 N/A 36 N/A 1.625 N/A 47.25
N/A 42 N/A 53.00 N/A 1.250 N/A 755 N/A 36 N/A 1.625 N/A 49.50
N/A 44 N/A 55.25 N/A 1.250 N/A 820 N/A 40 N/A 1.625 N/A 51.75
N/A 46 N/A 57.25 N/A 1.250 N/A 882 N/A 40 N/A 1.625 N/A 53.75
N/A 48 N/A 59.50 N/A 1.375 N/A 1050 N/A 44 N/A 1.625 N/A 56.00
N/A 50 N/A 61.75 N/A 1.375 N/A 1120 N/A 44 N/A 1.875 N/A 58.25
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