https://www.lockwiki.com/api.php?action=feedcontributions&feedformat=atom&user=Dhk42 2026-05-26T13:35:37Z User contributions MediaWiki 1.38.5 https://www.lockwiki.com/index.php?title=Master_Lock_No_140&diff=8796 2018-01-14T12:20:37Z

<p>Dhk42: /* Vulnerabilities */</p> <hr /> <div>= Master Lock No. 140 =<br /> <br /> {{Lock model<br /> | name = Master Lock No. 140<br /> | Img = File:Master140.JPG<br /> | Img_size = 150px<br /> | maker = [[Master Lock]]<br /> | lock_type = [[Padlock]], [[Cylinder]]<br /> | lock_design = [[Pin-tumbler]]<br /> | years_produced = <br /> | patent = <br /> | related = <br /> }}<br /> <br /> The '''No. 140''' is a [[pin-tumbler]] [[padlock]] made by [[Master Lock]]. The No. 140 is a solid body padlock with an inner cylinder that uses four pin stacks and contains spooled [[security pin]]s.<br /> <br /> __TOC__<br /> &lt;br clear=all&gt;<br /> <br /> == Principles of operation ==<br /> <br /> :''See also [[Pin-tumbler#Principles_of_Operation|Pin-tumbler (Principles of Operation)]]''<br /> <br /> The No. 140 cylinder is a [[pin-tumbler]] lock with four pin stacks and one or more spooled [[security pin]]s in various chambers. Older versions of the lock use one spool pin in the third chamber. The No. 140 can only be opened by rotating the [[plug]] clockwise.<br /> <br /> == Disassembly instructions ==<br /> <br /> The No. 140 cannot be disassembled non-destructively; to disassemble it the lock must be sawed in half. The lock is nonfunctional once disassembled because the padlock body acts as the cylinder for the lock.<br /> <br /> == Vulnerabilities ==<br /> <br /> The 140s reduced pin-tumbler count and poor manufacturing tolerances allows it to be easily picked by low skill attackers despite having spool pins. It is commonly used in [[locksport]] groups and an introductory lock for beginners to learn about defeating security pins (although note that some recent examples have no security pins at all). The No. 140 may be vulnerable to one or more of the following:<br /> <br /> * [[Lockpicking]]<br /> * [[Key bumping]]<br /> * [[Impressioning]]<br /> * [[Bypass]]<br /> * [[Destructive entry]]<br /> <br /> == See also ==<br /> <br /> * [[Pin-tumbler]]<br /> * [[Padlock]]<br /> * [[Master Lock]]<br /> <br /> [[Category:Pin-tumbler locks]]<br /> [[Category:Padlocks]]<br /> [[Category:Master Lock|No 1]]<br /> [[Category:Lock models]]</div>

Dhk42