Indian standard dimensions for spherical washers and conical seats 
Indian Standards Institution 
 - New Delhi  Indian Standards Institution  1967 
 - 5p. 
<br/><br/> IS 4297 : 1967 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Conical Seats<br/> Spherical Washers <br/> Standards <br/>NASA Thesaurus 
<br/><br/><label>Universal Decimal Class. No.: </label>083.7:621.229.3  / ISI