Indian Standard : specification for AC electricity meters - part 7 volt-ampere-hour-meters for full power factor range  hexagon head bolts (size range M5 to M64 

 - New Delhi  Bureau of Indian Standards  1988 
 - 2p. 
<br/><br/> IS : 722 (part 7/sec 2) - 1987 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hexagon screws<br/>Indian Standard