Specification for ISO metric screw threads.  Part 1.  principles and basic data / 
British Standards Institution. 
 - 37 leaves :  illustrations ;  30 cm. 
 - British standard ;  BS 3643 : Part 1 : 1981 .
 - British standard ;  BS 3643 : Part 1 : 1981 .
<br/><br/><label>ISBN: </label>0580116263 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Screw-threads--Specifications