Radium 3/8" NPT Round Internal Hex Plug
£11.00
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Radium 3/8" NPT Round Internal Hex Plug
14-0173
£11.00
NPT (National Pipe Thread) fittings seal by the intentional interference created by the tapered threads meshing together.
Always use a small amount of PTFE paste or tape on NPT threads and tighten to finger tight, then add another 1.5 to 3 turns until tight.