• ANSI B16.5 Lap Joint Flange
  • All dimensions are in inches.
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Item #

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Length Thru Hub (Y)

Hub Diameter (X)

Radius (r)

Bore (B)

Approximate Weight (lbs)

Bolt Circle (C)

Number of Holes

Diameter of Holes

N/A 1/2 N/A 3.75 N/A 0.56 N/A 0.88 N/A 1.50 N/A 0.13 N/A 0.90 N/A 2 N/A 2.63 N/A 4 N/A 0.63
N/A 3/4 N/A 4.63 N/A 0.63 N/A 1.00 N/A 1.88 N/A 0.13 N/A 1.11 N/A 3 N/A 3.25 N/A 4 N/A 0.75
N/A 1 N/A 4.88 N/A 0.69 N/A 1.06 N/A 2.13 N/A 0.13 N/A 1.38 N/A 4 N/A 3.50 N/A 4 N/A 0.75
N/A 1 1/4 N/A 5.25 N/A 0.81 N/A 1.13 N/A 2.50 N/A 0.19 N/A 1.72 N/A 5 N/A 3.88 N/A 4 N/A 0.75
N/A 1 1/2 N/A 6.13 N/A 0.88 N/A 1.25 N/A 2.75 N/A 0.25 N/A 1.97 N/A 7 N/A 4.50 N/A 4 N/A 0.88
N/A 2 N/A 6.50 N/A 1.00 N/A 1.44 N/A 3.31 N/A 0.31 N/A 2.46 N/A 9 N/A 5.00 N/A 8 N/A 0.75
N/A 2 1/2 N/A 7.50 N/A 1.13 N/A 1.63 N/A 3.94 N/A 0.31 N/A 2.97 N/A 12 N/A 5.88 N/A 8 N/A 0.88
N/A 3 N/A 8.25 N/A 1.25 N/A 1.81 N/A 4.63 N/A 0.38 N/A 3.60 N/A 15 N/A 6.63 N/A 8 N/A 0.88
N/A 3 1/2 N/A 9.00 N/A 1.38 N/A 1.94 N/A 5.25 N/A 0.38 N/A 4.10 N/A 20 N/A 7.25 N/A 8 N/A 1.00
N/A 4 N/A 10.75 N/A 1.50 N/A 2.13 N/A 6.00 N/A 0.44 N/A 4.60 N/A 36 N/A 8.50 N/A 8 N/A 1.00
N/A 5 N/A 13.00 N/A 1.75 N/A 2.38 N/A 7.44 N/A 0.44 N/A 5.69 N/A 61 N/A 10.50 N/A 8 N/A 1.13
N/A 6 N/A 14.00 N/A 1.88 N/A 2.63 N/A 8.75 N/A 0.50 N/A 6.75 N/A 78 N/A 11.50 N/A 12 N/A 1.13
N/A 8 N/A 16.50 N/A 2.19 N/A 3.00 N/A 10.75 N/A 0.50 N/A 8.75 N/A 110 N/A 13.75 N/A 12 N/A 1.25
N/A 10 N/A 20.00 N/A 2.50 N/A 4.38 N/A 13.50 N/A 0.50 N/A 10.92 N/A 170 N/A 17.00 N/A 16 N/A 1.38
N/A 12 N/A 22.00 N/A 2.63 N/A 4.63 N/A 15.75 N/A 0.50 N/A 12.92 N/A 200 N/A 19.25 N/A 20 N/A 1.38
N/A 14 N/A 23.75 N/A 2.75 N/A 5.00 N/A 17.00 N/A 0.50 N/A 14.18 N/A 250 N/A 20.75 N/A 20 N/A 1.50
N/A 16 N/A 27.00 N/A 3.00 N/A 5.50 N/A 19.50 N/A 0.50 N/A 16.19 N/A 365 N/A 23.75 N/A 20 N/A 1.63
N/A 18 N/A 29.25 N/A 3.25 N/A 6.00 N/A 21.50 N/A 0.50 N/A 18.20 N/A 435 N/A 25.75 N/A 20 N/A 1.75
N/A 20 N/A 32.00 N/A 3.50 N/A 6.50 N/A 24.00 N/A 0.50 N/A 20.25 N/A 570 N/A 28.50 N/A 24 N/A 1.75
N/A 22 N/A 34.25 N/A 3.75 N/A 6.88 N/A 26.25 N/A 0.50 N/A 22.25 N/A 670 N/A 30.63 N/A 24 N/A 1.88
N/A 24 N/A 37.00 N/A 4.00 N/A 7.25 N/A 28.25 N/A 0.50 N/A 24.25 N/A 810 N/A 33.00 N/A 24 N/A 2.00
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