Dimensions Threaded Flanges & Stud Bolts ASME B16.5



Threaded flange

OTHER DIAMETERS

NPS 1/2

CLass 150 300 600 900 1500 2500
DIA
A		 30 38 38 38 38 43
DIA
D		 90 95 95 120 120 135
THK
B		 9.6 12.7 14.3 22.3 22.3 30.2
11.2 14.3 20.7 28.7 28.7 36.6
DIA
G		 35.1 35.1 35.1 35.1 35.1 35.1
DIA
K		 60.3 66.7 66.7 82.6 82.6 88.9
H 14 21 22 32 32 40
15.6 22.6 28.4 38.4 38.4 46.4
NO.
L		 4 4 4 4 4 4
DIA
L		 15.9 15.9 15.9 22.2 22.2 22.2
Stud Bolts Diameter x Length
DIA
(in)		 1/2 1/2 1/2 3/4 3/4 3/4
Lenght
(mm)		 55 65 75 110 110 120

Important Information

Notes..

  • Dimensions are in millimeters unless otherwise indicated.
  • The length of the Stud Bolt does not include the height of the chamfers (points).

Dimensional Tolerances of Threaded Flanges ASME B16.5
Outside Diameter *
Tolerances not listed in ASME B16.5 2013
≤ 24 = 1.6 mm
> 24 = ± 3.2 mm
Inside Diameter
Within Limits on Boring Gauge
Drilling
Bolt Circle = 1.6 mm
Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle
≤ 2.1/2 = 0.8 mm max.
≥ 3 = 1.6 mm max.
Outside Diameter of Hub
≤ 12 = + 2.4 mm / - 1.6 mm
≥ 14 = ± 3.2 mm
Diameter of Counterbore
Same as forInside Diameter
Thickness
≤ 18 = + 3.2 mm / - 0
≥ 20 = + 4.8 mm / - 0
Length thru Hub
≤ 18 = + 3.2 mm / - 0.8 mm
≥ 20 = + 4.8 mm / - 1.6 mm
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face
Tongue and Groove / Male-Female
± 0.4 mm


Studs are measured parallel to the axis (L) from the first to the thread without the chamfers (points). S = free threads equals 1/3 time bolt dia

Measuring lengths of Stud Bolts


Hex bolts are measured from under the head to the top of de bolt


Measuring lengths of Hex bolts
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