- Used in general service applications running air, water, oil or gas up to 2,000 PSI NSCWP (non-shock cold working pressure)
- Grey sub, blue nut
- Hammer unions work at extremely high pressures. Mismatching components of one series with another (i.e. series 602 with series 1502) can lead to destruction of property, serious bodily injury or death.
- Pressure rating given at ambient temperature 70°F/21°C.