INSAPFLEX

ENGINEERING DATA FITTING IDENTIFICATION
FITTING IDENTIFICATION

Measuring Threads and seat angles

Measuring Threads

With the calliper measure the thread diameter at the largest point. ( O.D. of male threads - I.D. of female threads)

Use a thread pitch gauge to determine the number of threads per inch or the distance between threads in metric connections. Place the gauge on the threads until the fit is snug. Match the measurement to the chart.

Measure Seat Angles     

When the centreline of the seat gauge extends parallel with the projected longitudinal axis of the coupling, then the angles of the gauge and seat match.

 


Compare the measurements taken to a coupling shown in coupling specification tables that appear in this catalogue.

FITTING IDENTIFICATION  
DASH NUMBERS   
  
Most fluid piping system sizes are measured by dash numbers. These are universally used abbreviations for the size of component expressed as the numerator of the fraction with the denominator always being 16.For example, a. -04 part is 4/16 or 1/4 inch. Dash numbers  are usually nominal (in name only) and are abbreviations that make  ordering of components easier.

There are few coupling systems used for hydraulic connections. They are identified as :                                                                       

American, British, French, German, Japanese       

This section lists the origin and coupling style.                    

Description and dimensional data follows each coupling style.
 

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