Chrome "Turn and tighten" gas locker lock with barrel and keys

First 90 degree turn of key turns sneck by 90 degrees -

 - Second 90 degree turn of key pulls sneck inwards by 6mm approx.

Diameter of lock outer section: 28.3mm

Threaded section measures: 30mm in length

Extreme length 78mm open - 72mm locked

Metal catch plate / sneck is 39mm long -

- can be fitted other way round to increase the "reach" of the lock assembly - 

- the square hole on the catch plate is 8mm by 8mm - 

- these catch plates are usually interchangeable.  

GLL15U