What are these screws/fittings for upvc door called

Vasquez65

One of these large screws with an allen key hole is missing from my front door frame where the handle lock  goes and I’m now having trouble getting the door handle far enough up to lock the door due to the metal plate moving I presume. 

I cant find anything online so hoping someone can help

Ajmason42

Looks like some sort of cam adjusting screw I doubt you will be able to buy one on its own  plenty of mullenco supplies online  do you know who installed  may be approach them 

Hasbeen

Vasquez65 said:

One of these large screws with an allen key hole is missing from my front door frame where the handle lock  goes and I’m now having trouble getting the door handle far enough up to lock the door due to the metal plate moving I presume. 

I cant find anything online so hoping someone can help

You would need to google HOOK KEEP but similar here:

https://www.lockmaster.co.uk/gu-ferco-hook-keeps-5255-p.asp

http://www.lockstocker.co.uk/product/millenco-92mm-hookdbolt-roller-keepset-330mm-rh-z137c/