Test Point (M16x2), 1/4″ NPT


The health of a hydraulic system is determined by two parameters – oil temperature and pressure. Therefore, a vital element of hydraulic system design is to install components in the system that make it possible for maintenance technicians to check pressure at pre-determined intervals effortlessly and allow those technicians to do so safely.

The test point or pressure test coupling is designed for just such a task. They allow machine operators and maintenance personnel to easily and safely connect analog/digital measuring and display devices for the temporary testing or continuous monitoring of system pressure. This type of connection requires no tools, can be used during machinery operation, and will spill no oil when connected and disconnected. The unit even has the capability to connect under pressure up to 5800 PSI (400 bar).

The pressure testing side of the test point is M16x2. The side that connects into the machinery comes in a variety of connections – NPT, SAE, JIC, Metric, BSPP, BSPT, ORFS, DKO, etc. A benefit of using the M16x2 test point is that it also minimizes the introduction of contamination in a hydraulic system. Most system failures are caused by contaminated oil. The units are suitable for hydraulic oils and other mineral-based fluids.

The M16x2 test coupling has many names. It is often referred to as a test point, Minimess®, MiniPress®, Test 20, EMA, or Press-Check.

Use in conjunction with the direct gauge adapter.


  • Material: Steel (Zinc/nickel-plated)
  • Nipple Thread Connection: M16x2 (According to ISO 15171-2)
  • Threaded Connection: 1/4″ NPT
  • Seal: Buna-N (NBR)
  • Maximum Working Pressure: 9137 PSI (630 bar)
  • Connect Under Pressure: 5800 PSI (400 bar)
  • Temperature Rating: -4 to +212°F (-20 to +100°C)
  • Media: Suitable for hydraulic oils and other mineral-based fluids

Interchangeable with:

  • Parker: EMA3/1/4NPT
  • MCS: 620.01.304.31
  • Hydac: 00639645
  • HydroTechnik: 2103-01-47.00
  • Spradow: 1-906-44-02-600-CF
  • …And many others
SKU: HC-PT-P-4 Category:
Print Friendly, PDF & Email

Additional information

Weight 0.1 lbs
Dimensions 2.25 × .8 × .8 in
Thread Size


Connection Type

Male NPT

Nominal Size



Steel, Zinc/Nickel-Plated

Seal Type

Sealant Required