The SRAM 10 powerloc will not fit a Shimano, KMC or Wipperman chain that are all wider across the inner plates than SRAM or Campy 10 UN. The master links from the wider groups can be interchanged.

Wipperman and KMC are both reuseable.

The SRM 10 powerloc is officially not reuseable, but with the right pliers, you can queeze the rollers together and take it off, for reuse. If it has no snap left upon reinstallation, I'd toss it.

Forster sell the superlink in the model 3 for the wider group or chain and the model 4 for SRAM or Campy.

As for using the replacement pins - read the Shimano instructions?