Flange Bolt Chart
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Flange
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NPS 20
Class 900
Dimensions for NPS 20 Class 900 generic flange
33.75
29.5
X
4.25
Field
Value
Notes
Outside Diameter of Flange (O)
33-3/4"
Note
Minimum Thickness of Flange (tf)
4-1/4"
Note
Diameter of Bolt Circle (W)
29-1/2"
Note
Flange dimensions in seconds.
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