Master Lock No 140: Difference between revisions
m (Fix comb pick link) |
m (clean-up) |
||
| Line 6: | Line 6: | ||
| Img_size = 150px | | Img_size = 150px | ||
| maker = [[Master Lock]] | | maker = [[Master Lock]] | ||
| lock_type = [[Padlock | | lock_type = [[Padlock]] | ||
| lock_design = [[Pin-tumbler]] | | lock_design = [[Pin_tumbler|Pin-tumbler]] | ||
| years_produced = | | years_produced = | ||
| patent = | | patent = | ||
| related = | | related = [[Master Lock No 141]]<br>[[Master Lock No 142]] | ||
| spec_on = true | |||
| spec_comptype = Pin-tumbler | |||
| spec_comp = 4 | |||
}} | }} | ||
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 may contain spooled [[security pin]]s. | The '''No. 140''' is a [[Pin_tumbler|pin-tumbler]] [[Padlock|padlock]] made by [[Master Lock]]. The No. 140 is a 40mm wide solid body padlock with an inner cylinder that uses four pin stacks and may contain spooled [[security pin]]s. The [[bolt|shackle]] has a diameter of 6mm, and a length of either 22mm or 38mm. | ||
__TOC__ | __TOC__ | ||
| Line 20: | Line 23: | ||
== Principles of operation == | == Principles of operation == | ||
:''See also [[ | :''See also [[Pin_tumbler#Principles_of_Operation|Pin-tumbler (Principles of Operation)]]'' | ||
The No. 140 cylinder is a | The No. 140 cylinder is a pin-tumbler lock with four pin stacks. Older versions of the lock use one spool pin in the third chamber, more recent versions may have the spool in a random position or no spool at all. The No. 140 can only be opened by rotating the [[Plug|plug]] clockwise. | ||
== Disassembly instructions == | == Disassembly instructions == | ||
| Line 30: | Line 33: | ||
== Vulnerabilities == | == Vulnerabilities == | ||
The 140s low 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 | The 140s low 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 as an introductory lock for beginners to learn about defeating security pins (although note that some recent examples have no security pins at all). | ||
The 140 series is vulnerable to | The 140 series is vulnerable to overlift attacks, where the entire pin stack can be lifted with a [[comb pick]] into the driver's pin chamber, allowing plug rotation. | ||
The No. 140 may be vulnerable to one or more of the following: | The No. 140 may be vulnerable to one or more of the following: | ||
| Line 44: | Line 47: | ||
== See also == | == See also == | ||
* [[ | * [[Master Lock]] | ||
* [[Padlock]] | * [[Padlock]] | ||
* [[ | * [[Pin_tumbler|Pin-tumbler]] | ||
[[Category:Lock models]] | |||
[[Category:Master Lock]] | |||
[[Category:Padlocks]] | |||
[[Category:Pin-tumbler locks]] | [[Category:Pin-tumbler locks]] | ||
Revision as of 01:50, 7 April 2021
Master Lock No. 140
| Master Lock No. 140 | |
 | |
| Name | Master Lock No. 140 |
|---|---|
| Manufacturer | Master Lock |
| Lock Type | Padlock |
| Lock Design | Pin-tumbler |
| Specifications | |
| # of Components | 4 |
| Component Type | Pin-tumbler |
| Related Locks | |
| Master Lock No 141 Master Lock No 142 | |
The No. 140 is a pin-tumbler padlock made by Master Lock. The No. 140 is a 40mm wide solid body padlock with an inner cylinder that uses four pin stacks and may contain spooled security pins. The shackle has a diameter of 6mm, and a length of either 22mm or 38mm.
Principles of operation
The No. 140 cylinder is a pin-tumbler lock with four pin stacks. Older versions of the lock use one spool pin in the third chamber, more recent versions may have the spool in a random position or no spool at all. The No. 140 can only be opened by rotating the plug clockwise.
Disassembly instructions
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.
Vulnerabilities
The 140s low 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 as an introductory lock for beginners to learn about defeating security pins (although note that some recent examples have no security pins at all).
The 140 series is vulnerable to overlift attacks, where the entire pin stack can be lifted with a comb pick into the driver's pin chamber, allowing plug rotation.
The No. 140 may be vulnerable to one or more of the following:
