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Keyed Alike Ingersol Impregnable Closed Shackle Padlock

Product Attributes

Weatherproof Rating (?)Outdoor
MaterialHardened Steel
£290.44  inc vat
  • 1 - 2
  • 3 - 5
  • 6 - 10
  • 11 - 20
  • 21+ 
  • £242.03 ex vat
  • £235.98 ex vat
  • £229.93 ex vat
  • £223.88 ex vat
  • £217.83 ex vat
Large bulk orders? Contact us
Keyed Alike Ingersol Impregnable Closed Shackle Padlock Ingersoll CS712 KA 233s950

This is the keyed alike version of the Ingersoll Closed Shackle Padlock CS712. We are the only company to stock these off the shelf for next day delivery. The closed shackle version is the same as the popular OS711 but with added protection. Assembled in the UK and popular with NATO and the MOD.

More about this product

About this product

Keyed Alike:
This means that when you buy two or more padlocks from the keyed alike range they will all be operated by the same key. Each padlock comes with two keys as standard. If you require a specific keyed alike padlock matched to a code or a number of sets of keyed alike padlocks please contact us.

One of the longest standing locks on the market and originally released in 1971 under the model name Impregnable. They are still made today using the same 'old school' high quality manufacturing techniques. Expensive yes, but reassuringly so. This closed shackle version is similar to it's open shackle brother, the OS711, but wth the added protection against saws and bolt cutters.

Ingersoll used to be a family owned British company but since acquired. They continue to make a small but highly regarded range of padlocks which are still manufactured in England. This is unconfirmed but our suspicion is that they were originally made for Military contract and now found their way into the civilian market as a high security padlock.

NATO stock number (NSN): 5340991385224 and/or 534099504380


It is made from hardened steel which is graded in the UK and then finished in a dull nickel chrome plate to give it some weather resistance. This is important since imported steel from China can be of dubious quality. This is the closed shackle version which is design to help protect against force attacked. Bare in mind however that it will restrict fitting compatibility. Strangely, the mechanism uses levers rather than disc or pins which have, in recent times, been seen as less secure. That said this lock used 10 levers which is twice the number required by UK insurance companies for lever padlocks. Can it be picked? Highly unlikely.

Body and shackle are hardened so forget about cutting it. Drilling? Well as you can see from the image below there is a Z shaped anti drill bar preventing that and then a keyway cover that slides over the top.


3 keys with every lock as standard. Note that you will not be able to easily get new copies made since the key blanks are not commonly stocked by high street locksmiths.


Interesting articles shwoing the release of the Impregnable Series back in 1971. Still the same high quality today.


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