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CNC Machining Parts

CNC Machined Adapters & Fittings

CNC machined adapters, unions and fluid fittings with sealed faces and threads cut to the specified standard.

Materials6061-T6 / 7075-T6 aluminium, 45# carbon steel, 304 / 316L stainless, C360 copper, POM / nylon / PTFE
Tolerance±0.05 mm general tolerance, ±0.01 mm on critical features — held to print
Surface finishAs-machined, bead blasted, anodised Type II, zinc plated, passivated
CNC machined adapters, unions and fluid fittings
About this part

What it is and why it is made that way

Adapters and unions are the fittings that join two different systems together, which makes their sealing face the part that has to be right. We machine the sealing face flat and square to the thread, cut the thread to the specified standard, and clean the sealing surface so it will actually seal when the customer fits it.

  • Sealing faces machined square to the thread axis
  • Threads cut to metric, NPT or BSPP standards
  • Sealing surfaces cleaned and degreased before packing
  • Hex, round or square wrench flats to drawing

Materials

  • Aluminium 6061-T6 / 7075-T6
  • Carbon steel 45# / Q235
  • Stainless 304 / 316L
  • Copper C360 / brass HPb59-1
  • Engineering plastics (POM, nylon, PTFE)

Production processes

  • 3-axis CNC turning
  • 3-axis CNC milling
  • 4-axis CNC milling
  • 5-axis machining

Typical applications

  • Hydraulic and pneumatic unions
  • Instrument adapters
  • Panel and bulkhead fittings
  • Thread conversion adapters
Specification

Technical detail

The ranges below are what this shop typically holds. Anything tighter than the baseline is possible — send the drawing and we will confirm it against your specific tolerances rather than quote from a table.

Materials6061-T6 / 7075-T6 aluminium, 45# carbon steel, 304 / 316L stainless, C360 copper, POM / nylon / PTFE
Tolerance±0.05 mm general tolerance, ±0.01 mm on critical features — held to print
Surface finishAs-machined, bead blasted, anodised Type II, zinc plated, passivated
Max. envelopeUp to Ø300 × 500 mm, per machine
InspectionCMM, micrometers, bore gauges, thread gauges — inspection report issued per batch
Face squareness≤0.02 mm to the thread axis
Thread standardMetric, NPT, BSPP or BSPT, to specification
Surface finishRa 1.6 µm on sealing faces, as standard
Material and finish are yours to choose. The lists above are the families this part is normally made in. We will not substitute a grade or change a tolerance without telling you first — and asking.
In the same process line

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Get a quote for this part

Send the drawing and we will quote it against your material, your tolerance and your quantity. One business day, in writing, with a lead time you can plan around.

Request a Quote

Request a quote

Send a drawing and we will quote it against your material, tolerance and quantity. A description of what the part has to do is enough to start.

We reply within one business day. Your details are used to answer this enquiry and nothing else.
Prefer to write directly?info@cma-nj.com+86-25-83784843