Sink waste fitting

[lustyd]

I just bought a couple of new basin wastes (plug holes to normal folk!) for the boat that look like these. They don't have a screw in the middle like some others, instead the top part screws into the bottom part. I plan to put some silicon sealant under it but am worried that will result in losing the fairly small amount of friction I will have to do the screwing. The cross in the hole is fairly thin so I imagine that would strip out immediately if I used it for leverage.

Any ideas on how to grip and turn this top part?

 

[Laysula]

Something like this?

Force 4 Expanding Bung Drain Plugs | Force 4 Chandlery

 

[lustyd]

Too wide unfortunately. Never seen those before, might have to get some they look like they'd come in handy for something some day!

 

[Mister E]

There is normally a rubber seal that is on the fitting underneath.

 

[chrishscorp]

You can pop two screwdriver shafts through the plastic grate section and by holding them you will be able to turn it to screw it tight, just dont apply too much force.