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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 Weld Neck Flange
Unit of Measure
Items ANSI B16.5 Class 400 Weld Neck Flange
0H600WNAN
ANSI B16.5 Class 600 Welding Neck Flanges
ANSI B16.5 Class 400 Weld Neck Flange
3Q600WNAN
ANSI B16.5 Class 600 Welding Neck Flanges
ANSI B16.5 Class 400 Weld Neck Flange
01600WNAN
ANSI B16.5 Class 600 Welding Neck Flanges
ANSI B16.5 Class 400 Weld Neck Flange
1Q600WNAN
ANSI B16.5 Class 600 Welding Neck Flanges
ANSI B16.5 Class 400 Weld Neck Flange
1H600WNAN
ANSI B16.5 Class 600 Welding Neck Flanges
Flange Type N/A Welding Neck
Nominal Pipe Size N/A 1/2 N/A 3/4 N/A 1 N/A 1 1/4 N/A 1 1/2
Outside Diameter (O) N/A 3.75 in N/A 4.63 in N/A 4.88 in N/A 5.25 in N/A 6.13 in
Thickness (T) N/A 0.56 in N/A 0.63 in N/A 0.69 in N/A 0.81 in N/A 0.88 in
Raised Face Diameter (R) N/A 1.38 in N/A 1.69 in N/A 2.00 in N/A 2.50 in N/A 2.88 in
Length Thru Hub (Y) N/A 2.06 in N/A 2.25 in N/A 2.44 in N/A 2.63 in N/A 2.75 in
Point of Weld (A) N/A 0.84 in N/A 1.05 in N/A 1.32 in N/A 1.66 in N/A 1.90 in
Hub Diameter (X) N/A 1.50 in N/A 1.88 in N/A 2.13 in N/A 2.50 in N/A 2.75 in
Bore (B) N/A Specified by purchaser
Approximate Weight N/A 2 lb N/A 4 lb N/A 4 lb N/A 6 lb N/A 8 lb
Bolt Circle (C) N/A 2.63 in N/A 3.25 in N/A 3.50 in N/A 3.88 in N/A 4.50 in
Number of Holes N/A 4
Diameter of Holes N/A 0.63 in N/A 0.75 in N/A 0.75 in N/A 0.75 in N/A 0.88 in