Dimensions Stud Bolts for RF-RTJ flanges ASME B16.5 Class 150


Stud bolt with two nuts

OTHER PRESSURE CLASSES

150
300
400
600
900

NPS DIA
bolts (in)
Length
RF
Length
RTJ
Number
of bolts
1/2 1/2 55   4
3/4 1/2 65   4
1 1/2 65 75 4
1.1/4 1/2 70 85 4
1.1/2 1/2 70 85 4
2 5/8 85 95 4
2.1/2 5/8 90 100 4
3 5/8 90 100 4
3.1/2 5/8 90 100 8
4 5/8 90 100 8
5 3/4 95 110 8
6 3/4 100 115 8
8 3/4 110 120 8
10 7/8 115 125 12
12 7/8 120 135 12
14 1 135 145 12
16 1 135 145 16
18 1.1/8 145 160 16
20 1.1/8 160 170 20
24 1.1/4 170 185 20

General notes..

  • Dimensions are in millimeters unless otherwise indicated.
  • Length dimensional tolerances for all Stud Bolts..
    length to 12 inch tolerance = ± 1.6 mm
    length over 12 inch to 18 inch tolerance = ± 3.2 mm
    length over 18 inch tolerance = ± 6.4 mm
  • The length of the Stud Bolt does not include the height of the chamfers (points).

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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