SCREW 1ST STAGE HIGH PRESSURE PORT
- High Pressure Plug/Screw for First Stage
- High Pressure (HP) plug for the HP port of a first stage scuba regulator, fitted with rubber O-ring.
- Screw in this plug to close off a HP port when not in use.
- 7/16" UNF thread - fits modern 1st stage regulator HP ports (if you have older regs, please check that it is not before ordering).