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Fitting Guide

Dimensions Size on Size Thredolets® - MSS SP97

Thredolet® Size on Size

Class 3000

NPS A B C D
1/2 1
25.40
1.3/8
34.92
15/16
23.81
5/8
15.87
3/4 1.1/16
26.98
1.5/8
41.27
1.3/16
30.16
13/16
20.63
1 1.5/16
33.33
2
50.80
1.7/16
36.51
1.1/16
26.98
1.5/16
33.33
2.3/8
60.32

44.45
1.3/8
34.92
1.3/8
34.92
2.7/8
73.02
2
50.80
1.5/8
41.27
2
38.10

88.90
2.9/16
65.08
2.1/16
52.38
1.29/32
48.41
4.1/16
103.18
3
76.20

63.50
3 2
50.80
4.13/16
122.23
3.11/16
93.66
3.1/16
77.78
2.1/8
53.97
5.3/8
136.52
4.7/16
112.71
3.9/16
90.48
4
57.15
6.1/16
153.98

120.65
4.1/16
103.18
5 2.7/16
61.91

184.15

133.35

133.35
6
69.85
8.11/16
220.66

146.05

146.05
General notes:
  • Dimensions: Top Row in Inches / Bottom Row in millimeters.
  • Root Gap - X - "Space" for welding the O'let is raised off the run pipe to establish proper weld gap by placing spacers, e.g. welding rods, under the fitting. This provides a uniform welding gap between the curvature of the run and base of fitting.
  • Threaded Ends are in accordance with ASME B1.20.1. Design per MSS SP-97.
  • Source comes from Bonney Forge (except the sizes in millimeters).
  • Thredolet® is a registered name. Another often used name is Threaded Outlet.
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