Master Lock No 142: Difference between revisions
(Inconsistency - lead paragraph claims no security pins, Vulnerabilities section claims security pins. 142 has no security pins, corrected. Minor model number inconsistency fixed.) |
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= Master Lock No. 142 = | = Master Lock No. 142 = | ||
{{Lock model | {{Lock model | ||
| name = Master Lock No. 142 | | name = Master Lock No. 142 | ||
| Line 7: | 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 = [[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 | |||
| spec_comp = 4 | |||
}} | }} | ||
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. | |||
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. | |||
__TOC__ | __TOC__ | ||
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== Principles of operation == | == Principles of operation == | ||
:''See also [[ | :''See also [[Pin_tumbler#Principles_of_Operation|Pin-tumbler (Principles of Operation)]]'' | ||
The No. 142 can only be opened by rotating the | 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 | 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 | 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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== 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 01:10, 7 April 2021
Master Lock No. 142
| Master Lock No. 142 | |
|
File:Master142.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
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:
