Hi Andreas, its Dave from Apollo Fixings. We can supply you with the original Apollobolt that has the single and best cutting thread around. We used to do xcalibur but the Apollobolt is easier to install and has provided better load results into low density brick.
Please, please, please forget your bullets they may work but they are not recommended for brick and most concrete applications for the majority of scaffolding applications. Honestly, many may use them but you are deciding to buy a product that the manufacturers not not recommend themselves. If any one tells you otherwise they are wrong.
We do a plate converter that allows you to use an M16 ring and a bolt headed Apollobolt.
I know scaffy has provided our details but heres our no. 01527 63999. Next day nationwide delivery.