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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

0H900THAN N/A 1/2 N/A 4.75 in N/A 0.88 in N/A 1.38 in N/A 1.25 in N/A 1.50 in N/A 4 lb N/A 3.25 in N/A 4 N/A 0.88 in
3Q900THAN N/A 3/4 N/A 5.13 in N/A 1.00 in N/A 1.69 in N/A 1.38 in N/A 1.75 in N/A 5 lb N/A 3.50 in N/A 4 N/A 0.88 in
01900THAN N/A 1 N/A 5.88 in N/A 1.13 in N/A 2.00 in N/A 1.63 in N/A 2.06 in N/A 8 lb N/A 4.00 in N/A 4 N/A 1.00 in
1Q900THAN N/A 1 1/4 N/A 6.25 in N/A 1.13 in N/A 2.50 in N/A 1.63 in N/A 2.50 in N/A 9 lb N/A 4.38 in N/A 4 N/A 1.00 in
1H900THAN N/A 1 1/2 N/A 7.00 in N/A 1.25 in N/A 2.88 in N/A 1.75 in N/A 2.75 in N/A 12 lb N/A 4.88 in N/A 4 N/A 1.13 in
02900THAN N/A 2 N/A 8.50 in N/A 1.50 in N/A 3.63 in N/A 2.25 in N/A 4.13 in N/A 25 lb N/A 6.50 in N/A 8 N/A 1.00 in
2H900THAN N/A 2 1/2 N/A 9.63 in N/A 1.63 in N/A 4.13 in N/A 2.50 in N/A 4.88 in N/A 36 lb N/A 7.50 in N/A 8 N/A 1.13 in
03900THAN N/A 3 N/A 9.50 in N/A 1.50 in N/A 5.00 in N/A 2.13 in N/A 5.00 in N/A 26 lb N/A 7.50 in N/A 8 N/A 1.00 in
04900THAN N/A 4 N/A 11.50 in N/A 1.75 in N/A 6.19 in N/A 2.75 in N/A 6.25 in N/A 53 lb N/A 9.25 in N/A 8 N/A 1.25 in
05900THAN N/A 5 N/A 13.75 in N/A 2.00 in N/A 7.31 in N/A 3.13 in N/A 7.50 in N/A 83 lb N/A 11.00 in N/A 8 N/A 1.38 in
06900THAN N/A 6 N/A 15.00 in N/A 2.19 in N/A 8.50 in N/A 3.38 in N/A 9.25 in N/A 110 lb N/A 12.50 in N/A 12 N/A 1.25 in
08900THAN N/A 8 N/A 18.50 in N/A 2.50 in N/A 10.63 in N/A 4.00 in N/A 11.75 in N/A 170 lb N/A 15.50 in N/A 12 N/A 1.50 in
10900THAN N/A 10 N/A 21.50 in N/A 2.75 in N/A 12.75 in N/A 4.25 in N/A 14.50 in N/A 245 lb N/A 18.50 in N/A 16 N/A 1.50 in
12900THAN N/A 12 N/A 24.00 in N/A 3.13 in N/A 15.00 in N/A 4.63 in N/A 16.50 in N/A 325 lb N/A 21.00 in N/A 20 N/A 1.50 in
14900THAN N/A 14 N/A 25.25 in N/A 3.38 in N/A 16.25 in N/A 5.13 in N/A 17.75 in N/A 400 lb N/A 22.00 in N/A 20 N/A 1.63 in
16900THAN N/A 16 N/A 27.75 in N/A 3.50 in N/A 18.50 in N/A 5.25 in N/A 20.00 in N/A 425 lb N/A 24.25 in N/A 20 N/A 1.75 in
18900THAN N/A 18 N/A 31.00 in N/A 4.00 in N/A 21.00 in N/A 6.00 in N/A 22.25 in N/A 600 lb N/A 27.00 in N/A 20 N/A 2.00 in
20900THAN N/A 20 N/A 33.75 in N/A 4.25 in N/A 23.00 in N/A 6.25 in N/A 24.50 in N/A 730 lb N/A 29.50 in N/A 20 N/A 2.13 in
24900THAN N/A 24 N/A 41.00 in N/A 5.50 in N/A 27.25 in N/A 8.00 in N/A 29.50 in N/A 1400 lb N/A 35.50 in N/A 20 N/A 2.63 in
Unit of Measure
1