"Handy to have around, always keep a few of these around with the plugs and some coax. Only takes a couple of minutes and you can produce an aerial lead to suit exact requirements and costs very little."
"Sadly the smart metal coax coupler packets of 10no, contain the centre insulated spigot penetrated by manufacturing screws. The result is that insertion of the centre core of the coaxial cable is impossible to achieve, the thimble being blocked by what appears to be small screw threads. Not appropriate for the job. part no.52856"
"I've just purchased a pack of these and found that although the inner connector is a socket, the outer body is not. The outer body is the same diameter as the plugs so the plugs and sockets will not plug together. The photograph shown here is what you would expect of a socket with splits to allow a tight connection with the plug. The ones supplied to me (I checked the part number and it's 52856) do not have this split and the body is the same diameter as the plug.
I'm sure Screwfix would replace them as the fault is clearly with Labgear but this was a very inconvenient discovery.