Male/Male Adaptors

A Burnett and Hillman male x male hydraulic fitting is typically used when two female-threaded components need to be connected within a hydraulic system. These adaptors are especially useful for joining different thread types, such as BSPP to NPT, or for connecting different sizes of the same thread standard. They are also used to convert between sealing methods, for example, linking a BSPP female port, which seals with a bonded washer, to a JIC female port that seals on a 37° cone. In addition, Burnett and Hillman male x male adaptors provide a compact solution in tight installations where space is limited, eliminating the need for additional hoses or elbows. In short, Burnett and Hillman’s male x male hydraulic fittings offer a reliable and versatile way to connect female-threaded parts across a wide range of hydraulic applications.

For Tapered Threads (BSPT, NPT):

• PTFE Tape (Thread Seal Tape) is commonly used.
• Acts as a lubricant to prevent galling and helps create a pressure-tight seal.
• Suitable for oil, fuel, water, and hydraulic fluids.
• PTFE tape = only for BSPT and NPT male threads.
• Never use tape on BSPP, JIC, ORFS, SAE, or Metric parallel threads.
• Always ensure threads are clean and avoid loose tape strands entering the hydraulic system (contamination risk).

1. Check & Prepare:

• Make sure the threads match (BSP, NPT, JIC, etc.).
• Inspect threads, O-rings, and sealing faces for damage.
• Clean both ports before fitting.

      2. Apply Seal (if needed):

• Tapered threads (BSPT, NPT): use PTFE tape or thread sealant.
• Parallel threads (BSPP, Metric, SAE): use the correct O-ring or washer.
• JIC / ORFS: rely on the cone or face seal – no tape required.

      3. Tighten:

• Start by hand to avoid cross-threading.
• Use spanners on both hexes to tighten.

      4. Follow torque guidance:

• Tapered → 1 1/2–3 turns past finger tight.
• O-ring/washer → tighten until compressed.
• JIC/ORFS → tighten until faces meet, then snug.

      5. Check:

• Make sure fittings are aligned (no twisting).
• Pressurise slowly and check for leaks.
• If leaking, check seals instead of over-tightening.