Indian Standard : pipe threads where pressure-tight joints are not made on the threads -- dimensions, tolerances and designation 

 - New Delhi  Bureau of Indian Standards  1999 
 - 5p.  
<br/><br/> IS 2643 : 1999, ISO 228-1 : 1994 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Indian Standards