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ANSI B16.5 Lap Joint Flange
Unit of Measure
1 

Item #

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Length Thru Hub (Y)

Hub Diameter (X)

Radius (r)

Bore (B)

Approximate Weight

Bolt Circle (C)

Number of Holes

Diameter of Holes

0H2500LJAN N/A 1/2 N/A 5.25 in N/A 1.19 in N/A 1.56 in N/A 1.69 in N/A 0.13 in N/A 0.90 in N/A 7 lb N/A 3.50 in N/A 4 N/A 0.88 in
3Q2500LJAN N/A 3/4 N/A 5.50 in N/A 1.25 in N/A 1.69 in N/A 2.00 in N/A 0.13 in N/A 1.11 in N/A 8 lb N/A 3.75 in N/A 4 N/A 0.88 in
012500LJAN N/A 1 N/A 6.25 in N/A 1.38 in N/A 1.88 in N/A 2.25 in N/A 0.13 in N/A 1.38 in N/A 11 lb N/A 4.25 in N/A 4 N/A 1.00 in
1Q2500LJAN N/A 1 1/4 N/A 7.25 in N/A 1.50 in N/A 2.06 in N/A 2.88 in N/A 0.19 in N/A 1.72 in N/A 16 lb N/A 5.13 in N/A 4 N/A 1.13 in
1H2500LJAN N/A 1 1/2 N/A 8.00 in N/A 1.75 in N/A 2.38 in N/A 3.13 in N/A 0.25 in N/A 1.97 in N/A 22 lb N/A 5.75 in N/A 4 N/A 1.25 in
022500LJAN N/A 2 N/A 9.25 in N/A 2.00 in N/A 2.75 in N/A 3.75 in N/A 0.31 in N/A 2.46 in N/A 37 lb N/A 6.75 in N/A 8 N/A 1.13 in
2H2500LJAN N/A 2 1/2 N/A 10.50 in N/A 2.25 in N/A 3.13 in N/A 4.50 in N/A 0.31 in N/A 2.97 in N/A 53 lb N/A 7.75 in N/A 8 N/A 1.25 in
032500LJAN N/A 3 N/A 12.00 in N/A 2.63 in N/A 3.63 in N/A 5.25 in N/A 0.38 in N/A 3.60 in N/A 80 lb N/A 9.00 in N/A 8 N/A 1.38 in
042500LJAN N/A 4 N/A 14.00 in N/A 3.00 in N/A 4.25 in N/A 6.50 in N/A 0.38 in N/A 4.60 in N/A 120 lb N/A 10.75 in N/A 8 N/A 1.63 in
052500LJAN N/A 5 N/A 16.50 in N/A 3.63 in N/A 5.13 in N/A 8.00 in N/A 0.44 in N/A 5.69 in N/A 205 lb N/A 12.75 in N/A 8 N/A 1.88 in
062500LJAN N/A 6 N/A 19.00 in N/A 4.25 in N/A 6.00 in N/A 9.25 in N/A 0.44 in N/A 6.75 in N/A 315 lb N/A 14.50 in N/A 8 N/A 2.13 in
082500LJAN N/A 8 N/A 21.75 in N/A 5.00 in N/A 7.00 in N/A 12.00 in N/A 0.50 in N/A 8.75 in N/A 470 lb N/A 17.25 in N/A 12 N/A 2.13 in
102500LJAN N/A 10 N/A 26.50 in N/A 6.50 in N/A 9.00 in N/A 14.75 in N/A 0.50 in N/A 10.92 in N/A 900 lb N/A 21.25 in N/A 12 N/A 2.63 in
122500LJAN N/A 12 N/A 30.00 in N/A 7.25 in N/A 10.00 in N/A 17.38 in N/A 0.50 in N/A 12.92 in N/A 1100 lb N/A 24.38 in N/A 12 N/A 2.88 in
Unit of Measure
1