Indian Standards Institution <br/><br/>
Indian standard dimensions of spinoles and mounting arrangements for spindle operated electronic components part I section 3 flatted spindle 

 - Indian Standards Institution, New Delhi  1979 
 - 2 
<br/><br/><label>Dewey Class. No.: </label>IS:4586(part I/Sec 5)-1978 621.3815 I.S.I.