Indian standard specification for hexagonal bolts and nuts (m42 to m150) 
Indian Standards Institution 
 - New Delhi  Indian Standards Institution  1966 
 - 6p. 
<br/><br/> IS 3138 : 1966 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bolts and Nuts-Standards<br/>NASA Thesaurus<br/>Standards
<br/><br/><label>Universal Decimal Class. No.: </label>083.7:621.882  / ISI