Sealing monobloc tap tails

[decomplexity]

I use Loctite 55 thread for sealing half-inch and similar BSP male screw-threads. But when fitting a monobloc tap with the tiny 10mm threaded tails where the Loctite thread looks too fat, should I rely on the O-ring (with a dab of silicon lube) for sealing, one turn of PTFE, a smear of Loctite 577 or what please?

 

[ShaunCorbs]

Normally the o rings are fine if you want belt and braces you can apply a tiny bit of 577 but tbh not really needed

 

[townfanjon]

Nothing just hand tight .