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  • All dimensions are in inches.
  • These flanges will be furnished with a 1/4" raised face unless otherwise specified.
  • Flat face option available.

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ANSI B16.5 Class 400 Threaded Flanges
Unit of Measure
1 

Item #

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Raised Face Diameter (R)

Length Thru Hub (Y)

Hub Diameter (X)

Approximate Weight

Bolt Circle (C)

Number of Holes

Diameter of Holes

0H2500THAN N/A 1/2 N/A 5.25 in N/A 1.19 in N/A 1.38 in N/A 1.56 in N/A 1.69 in N/A 7 lb N/A 3.50 in N/A 4 N/A 0.88 in
3Q2500THAN N/A 3/4 N/A 5.50 in N/A 1.25 in N/A 1.69 in N/A 1.69 in N/A 2.00 in N/A 8 lb N/A 3.75 in N/A 4 N/A 0.88 in
012500THAN N/A 1 N/A 6.25 in N/A 1.38 in N/A 2.00 in N/A 1.88 in N/A 2.25 in N/A 11 lb N/A 4.25 in N/A 4 N/A 1.00 in
1Q2500THAN N/A 1 1/4 N/A 7.25 in N/A 1.50 in N/A 2.50 in N/A 2.06 in N/A 2.88 in N/A 16 lb N/A 5.13 in N/A 4 N/A 1.13 in
1H2500THAN N/A 1 1/2 N/A 8.00 in N/A 1.75 in N/A 2.88 in N/A 2.38 in N/A 3.13 in N/A 22 lb N/A 5.75 in N/A 4 N/A 1.25 in
022500THAN N/A 2 N/A 9.25 in N/A 2.00 in N/A 3.63 in N/A 2.75 in N/A 3.75 in N/A 38 lb N/A 6.75 in N/A 8 N/A 1.13 in
2H2500THAN N/A 2 1/2 N/A 10.50 in N/A 2.25 in N/A 4.13 in N/A 3.13 in N/A 4.50 in N/A 55 lb N/A 7.75 in N/A 8 N/A 1.25 in
032500THAN N/A 3 N/A 12.00 in N/A 2.63 in N/A 5.00 in N/A 3.63 in N/A 5.25 in N/A 83 lb N/A 9.00 in N/A 8 N/A 1.38 in
042500THAN N/A 4 N/A 14.00 in N/A 3.00 in N/A 6.19 in N/A 4.25 in N/A 6.50 in N/A 125 lb N/A 10.75 in N/A 8 N/A 1.63 in
052500THAN N/A 5 N/A 16.50 in N/A 3.63 in N/A 7.31 in N/A 5.13 in N/A 8.00 in N/A 210 lb N/A 12.75 in N/A 8 N/A 1.88 in
062500THAN N/A 6 N/A 19.00 in N/A 4.25 in N/A 8.50 in N/A 6.00 in N/A 9.25 in N/A 325 lb N/A 14.50 in N/A 8 N/A 2.13 in
082500THAN N/A 8 N/A 21.75 in N/A 5.00 in N/A 10.63 in N/A 7.00 in N/A 12.00 in N/A 485 lb N/A 17.25 in N/A 12 N/A 2.13 in
102500THAN N/A 10 N/A 26.50 in N/A 6.50 in N/A 12.75 in N/A 9.00 in N/A 14.75 in N/A 930 lb N/A 21.25 in N/A 12 N/A 2.63 in
122500THAN N/A 12 N/A 30.00 in N/A 7.25 in N/A 15.00 in N/A 10.00 in N/A 17.38 in N/A 1100 lb N/A 24.38 in N/A 12 N/A 2.88 in
Unit of Measure
1