Master Lock No 142: Difference between revisions

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(Inconsistency - lead paragraph claims no security pins, Vulnerabilities section claims security pins. 142 has no security pins, corrected. Minor model number inconsistency fixed.)
(photos, TOC)
 
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= Master Lock No. 142 =
<span style="font-size: 188%;">{{PAGENAME}}</span>
 
----
<!--
{{Lock model
{{Lock model
| name = Master Lock No. 142
| name = Master Lock No. 142
| Img = File:Master142.jpg
| Img = File:Master Lock 142 - FXE48039.jpg
| Img_size = 150px
| Img_size = 150px
| maker = [[Master Lock]]
| maker = [[Master Lock]]
| lock_type = [[Padlock]], [[Cylinder]]
| lock_type = [[Padlock]]
| lock_design = [[Pin-tumbler]]
| lock_design = [[Pin_tumbler|Pin-tumbler]]
| years_produced =  
| years_produced =  
| patent =  
| patent =  
| related = [[Master Lock No 140]] [[Master Lock No 141]]
| related = [[Master Lock No 140]]<br> [[Master Lock No 141]]
| spec_on      = true
| spec_comptype = [[Pin_tumbler |Pin-tumbler]]
| spec_comp    = 4
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-->
The '''No. 142''' is a [[Pin_tumbler|pin-tumbler]] [[Padlock|padlock]] made by [[Master Lock]]. The No. 142 is a 40mm wide solid body padlock with a blue plastic cover with the word "Master" inlaid in silver. The [[Plug|plug]] is made of brass and does not contain any security pins.  The [[bolt|shackle]] has a diameter of 6mm, and a length of either 22mm or 38mm.
 
The '''No. 142''' is a [[pin-tumbler]] [[padlock]] made by [[Master Lock]]. The No. 142 is a solid body padlock with a blue plastic cover with the word "Master" inlaid in silver. The [[plug]] is made of brass and does not contain any security pins.


__TOC__
__TOC__
<br clear=all>


== Principles of operation ==
== Principles of operation ==


:''See also [[Pin-tumbler#Principles_of_Operation|Pin-tumbler (Principles of Operation)]]''
:''See also [[Pin_tumbler#Principles_of_Operation|Pin-tumbler (Principles of Operation)]]''


The No. 142 can only be opened by rotating the [[plug]] clockwise.
The No. 142 can only be opened by rotating the plug clockwise.


== Disassembly instructions ==
== Disassembly instructions ==
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== Vulnerabilities ==
== Vulnerabilities ==


The 142's low pin-tumbler count and poor manufacturing tolerances allows it to be easily picked by low skill attackers. It is commonly used in [[locksport]] groups and an introductory lock for beginners to learn.
The 142's low pin-tumbler count and poor manufacturing tolerances allows it to be easily picked by low skill attackers. It is commonly used in [[locksport]] groups as an introductory lock for beginners to learn.


The 14x series is vulnerable to [[overlift]] attacks, where the entire pin stack can be lifted with a [[comb pick]] into the driver's pin chamber and allowing plug rotation. Additionally, the 14x series tends to use zero-lift pins, and once you can identify these pins you can simply avoid them as the pin rests at the shear line. This means less than the total four pins will need to be lifted to enter the lock.
The 14x series is vulnerable to overlift attacks, where the entire pin stack can be lifted with a [[Comb_pick|comb pick]] into the driver's pin chamber and allowing plug rotation. Additionally, the 14x series tends to use zero-lift pins, and once you can identify these pins you can simply avoid them as the pin rests at the shear line. This means less than the total four pins will need to be lifted to enter the lock.


The No. 142 may be vulnerable to one or more of the following:
The No. 142 may be vulnerable to one or more of the following:
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* [[Bypass]]
* [[Bypass]]
* [[Destructive entry]]
* [[Destructive entry]]
== Gallery ==
<gallery align="center">
File:Master Lock 142 - FXE48039.jpg | Front view
File:Master Lock 142 keyway - FXE48040.jpg | Keyway
File:Master Lock 142 & key - FXE48043.jpg | Padlock & key
</gallery>


== See also ==
== See also ==


* [[Pin-tumbler]]
* [[Master Lock]]
* [[Padlock]]
* [[Padlock]]
* [[Master Lock]]
* [[Pin_tumbler|Pin-tumbler]]


[[Category:Lock models]]
[[Category:Master Lock]]
[[Category:Padlocks]]
[[Category:Pin-tumbler locks]]
[[Category:Pin-tumbler locks]]
[[Category:Padlocks]]
[[Category:Master Lock|No 1]]
[[Category:Lock models]]

Latest revision as of 13:26, 6 January 2023

Master Lock No 142



Master Lock No. 142
Master Lock 142 - FXE48039.jpg
Name Master Lock No. 142
Manufacturer Master Lock
Lock Type Padlock
Lock Design Pin-tumbler
Specifications
# of Components 4
Component Type Pin-tumbler
Related Locks
Master Lock No 140
Master Lock No 141

The No. 142 is a pin-tumbler padlock made by Master Lock. The No. 142 is a 40mm wide solid body padlock with a blue plastic cover with the word "Master" inlaid in silver. The plug is made of brass and does not contain any security pins. The shackle has a diameter of 6mm, and a length of either 22mm or 38mm.

Principles of operation

See also Pin-tumbler (Principles of Operation)

The No. 142 can only be opened by rotating the plug clockwise.

Disassembly instructions

The No. 142 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 142's low pin-tumbler count and poor manufacturing tolerances allows it to be easily picked by low skill attackers. It is commonly used in locksport groups as an introductory lock for beginners to learn.

The 14x series is vulnerable to overlift attacks, where the entire pin stack can be lifted with a comb pick into the driver's pin chamber and allowing plug rotation. Additionally, the 14x series tends to use zero-lift pins, and once you can identify these pins you can simply avoid them as the pin rests at the shear line. This means less than the total four pins will need to be lifted to enter the lock.

The No. 142 may be vulnerable to one or more of the following:

Gallery

See also