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3. 'X' Series Casing:   

Every flush-coupled casing has a box thread at both ends and is connected by a pin to pin coupling. This allows replacement of couplings when pin threads become worn or damaged. Each length of casing is supplied with one coupling. Left hand threaded casing can be supplied on request.
 
Dimensions
   
Description AX BX NX HX
  in mm in mm in mm in mm
Casing O.D. 2.25 57.2 2.87 73.0 3.50 88.9 4.50 114.3
Coupling I.D. 1.91 48.4 2.37 60.4 3.00 76.4 3.96 100.2
Threads per inch

8 8 8 5
       

Description PX SX UX ZX
  in mm in mm in mm in mm
Casing O.D. 5.50 139.7 6.620 168.3 7.62> 193 8.62 219
Coupling I.D. 4.87 123.0 5.875 149.2 6.93 177 7.93 201
Threads per inch 5 5 4 4
 
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