• ANSI B16.5 Class 400 Threaded Flanges
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Item #

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Raised Face Diameter (R)

Length Thru Hub (Y)

Hub Diameter (X)

Approximate Weight (lbs)

Bolt Circle (C)

Number of Holes

Diameter of Holes

N/A 1/2 N/A 4.75 N/A 0.88 N/A 1.38 N/A 1.25 N/A 1.50 N/A 4 N/A 3.25 N/A 4 N/A 0.88
N/A 3/4 N/A 5.13 N/A 1.00 N/A 1.69 N/A 1.38 N/A 1.75 N/A 5 N/A 3.50 N/A 4 N/A 0.88
N/A 1 N/A 5.88 N/A 1.13 N/A 2.00 N/A 1.63 N/A 2.06 N/A 8 N/A 4.00 N/A 4 N/A 1.00
N/A 1 1/4 N/A 6.25 N/A 1.13 N/A 2.50 N/A 1.63 N/A 2.50 N/A 9 N/A 4.38 N/A 4 N/A 1.00
N/A 1 1/2 N/A 7.00 N/A 1.25 N/A 2.88 N/A 1.75 N/A 2.75 N/A 12 N/A 4.88 N/A 4 N/A 1.13
N/A 2 N/A 8.50 N/A 1.50 N/A 3.63 N/A 2.25 N/A 4.13 N/A 25 N/A 6.50 N/A 8 N/A 1.00
N/A 2 1/2 N/A 9.63 N/A 1.63 N/A 4.13 N/A 2.50 N/A 4.88 N/A 36 N/A 7.50 N/A 8 N/A 1.13
N/A 3 N/A 10.50 N/A 1.88 N/A 5.00 N/A 2.88 N/A 5.25 N/A 48 N/A 8.00 N/A 8 N/A 1.25
N/A 4 N/A 12.25 N/A 2.13 N/A 6.19 N/A 3.56 N/A 6.38 N/A 73 N/A 9.50 N/A 8 N/A 1.38
N/A 5 N/A 14.75 N/A 2.88 N/A 7.31 N/A 4.13 N/A 7.75 N/A 130 N/A 11.50 N/A 8 N/A 1.63
N/A 6 N/A 15.50 N/A 3.25 N/A 8.50 N/A 4.69 N/A 9.00 N/A 165 N/A 12.50 N/A 12 N/A 1.50
N/A 8 N/A 19.00 N/A 3.63 N/A 10.63 N/A 5.63 N/A 11.50 N/A 260 N/A 15.50 N/A 12 N/A 1.75
N/A 10 N/A 23.00 N/A 4.25 N/A 12.75 N/A 6.25 N/A 14.50 N/A 435 N/A 19.00 N/A 12 N/A 2.00
N/A 12 N/A 26.50 N/A 4.88 N/A 15.00 N/A 7.13 N/A 17.75 N/A 580 N/A 22.50 N/A 16 N/A 2.13
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