Master Lock No 140 - Revision history

Datagram at 16:18, 21 August 2025

2025-08-21T16:18:42Z

← Older revision		Revision as of 16:18, 21 August 2025
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	== Principles of operation ==		== Principles of operation ==

			:''See also [[Pin tumbler#Principles of operation\|Pin-tumbler (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\|plug]] clockwise.		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.

Mgsecure: /* Master Lock No. 140 */ link in specs

2022-12-26T13:57:15Z

Master Lock No. 140: link in specs

← Older revision		Revision as of 13:57, 26 December 2022
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	\| related = [[Master Lock No 141]]<br>[[Master Lock No 142]]		\| related = [[Master Lock No 141]]<br>[[Master Lock No 142]]
	\| spec_on = true		\| spec_on = true
	\| spec_comptype = Pin-tumbler		\| spec_comptype = [[Pin_tumbler \|Pin-tumbler]]
	\| spec_comp = 4		\| spec_comp = 4
	}}		}}

Mgsecure: /* Master Lock No. 140 */

2022-11-23T16:33:49Z

Master Lock No. 140

← Older revision		Revision as of 16:33, 23 November 2022
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	== Principles of operation ==		== Principles of operation ==

	~~:''See also [[Pin_tumbler#Principles_of_Operation\|Pin-tumbler (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\|plug]] clockwise.		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.

			:''See also [[Pin_tumbler#Principles_of_Operation\|Pin-tumbler (Principles of Operation)]]''
	[[~~File:Master140.JPG\|100px~~\|~~center~~]]

	== Disassembly instructions ==		== Disassembly instructions ==
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	* [[Bypass]]		* [[Bypass]]
	* [[Destructive entry]]		* [[Destructive entry]]

			== Gallery ==
			<gallery align="center">
			File:Master-140-front.jpg \| Master Lock 140
			File:Master Lock 140 keyway - FXE47765.jpg \| Master Lock 140 keyway
			File:Master140.JPG \| Master Lock 140

			</gallery>

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

Sandplum: centered image

2022-11-04T23:22:40Z

centered image

← Older revision		Revision as of 23:22, 4 November 2022
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	[[File:Master140.JPG\|100px]]		[[File:Master140.JPG\|100px\|center]]

	== Disassembly instructions ==		== Disassembly instructions ==

Sandplum: moved previous image into description

2022-11-04T23:10:43Z

moved previous image into description

← Older revision		Revision as of 23:10, 4 November 2022
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	{{Lock model		{{Lock model
	\| name = Master Lock No. 140		\| name = Master Lock No. 140
	~~<!--\| Img = File:Master140.JPG-->~~
	\| Img = File:Master-140-front.jpg		\| Img = File:Master-140-front.jpg
	\| Img_size = 150px		\| Img_size = 150px
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	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.		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.


			[[File:Master140.JPG\|100px]]

	== Disassembly instructions ==		== Disassembly instructions ==

Mgsecure: updated lock image

2022-10-21T16:02:22Z

updated lock image

← Older revision		Revision as of 16:02, 21 October 2022
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	{{Lock model		{{Lock model
	\| name = Master Lock No. 140		\| name = Master Lock No. 140
	\| Img = File:Master140.JPG		<!--\| Img = File:Master140.JPG-->
			\| Img = File:Master-140-front.jpg
	\| Img_size = 150px		\| Img_size = 150px
	\| maker = [[Master Lock]]		\| maker = [[Master Lock]]

Sandplum: clean-up

2021-04-07T01:50:02Z

clean-up

← Older revision		Revision as of 01:50, 7 April 2021
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	\| 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 =		\| 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__
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	== 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. 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.		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 ==
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	== 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 ~~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 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 ~~and~~ allowing plug rotation.		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:
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	== 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]]~~

Rlerner: Fix comb pick link

2019-07-30T03:05:50Z

Fix comb pick link

← Older revision		Revision as of 03:05, 30 July 2019
Line 32:		Line 32:
	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 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 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 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 140 series is vulnerable to [[overlift]] attacks, where the entire pin stack can be lifted with a [[comb]] into the driver's pin chamber and allowing plug rotation.		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 and 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:

Rlerner: Updated details about spools in 140s, overlifting attacks with comb pins

2019-07-30T03:04:29Z

Updated details about spools in 140s, overlifting attacks with comb pins

← Older revision		Revision as of 03:04, 30 July 2019
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	}}		}}

	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.		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.

	__TOC__		__TOC__
Line 22:		Line 22:
	:''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. 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.		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 ==		== Disassembly instructions ==
Line 30:		Line 30:
	== Vulnerabilities ==		== Vulnerabilities ==

	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:		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 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 140 series is vulnerable to [[overlift]] attacks, where the entire pin stack can be lifted with a [[comb]] into the driver's pin chamber and allowing plug rotation.

			The No. 140 may be vulnerable to one or more of the following:

	* [[Lockpicking]]		* [[Lockpicking]]

Dhk42: /* Vulnerabilities */

2018-01-14T12:20:37Z

Vulnerabilities

← Older revision		Revision as of 12:20, 14 January 2018
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	== Vulnerabilities ==		== Vulnerabilities ==

	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. The No. 140 may be vulnerable to one or more of the following:		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:

	* [[Lockpicking]]		* [[Lockpicking]]