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Pipe & Pneumatic Fittings · Industry standard · Application guide

What Are Push-In Pneumatic Fittings Used For?

Typical applications, the industries that specify push-in pneumatic fittings, and how to choose the right size, material and finish for the joint.

Push-In Pneumatic Fittings are used for joining and sealing fluid or pneumatic lines. They are manufactured to Industry standard, and selection is driven by the pipe thread size, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Joining and sealing fluid or pneumatic lines
Governing standard
Industry standard
Pipe thread size range
4 to 16
Category
Pipe & Pneumatic Fittings

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Push-In Pneumatic Fittings Used For? application image

Push-In Pneumatic Fittings are selected when an assembly calls for joining and sealing fluid or pneumatic lines. This application guide to the Industry standard type covers concrete end-uses, the specification checklist, correct installation, and where an alternative fastener performs better. Stocked across roughly 4 to 16, they cover general to heavy-duty work.

Typical Applications for Push-In Pneumatic Fittings

The most common settings where these are specified:

  • Process & plant piping: tapped connections on manifolds and equipment.
  • General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.
  • Maintenance & repair (MRO): a stocked size for servicing existing plant where the original fastener spec must be matched.
  • Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.
  • Pneumatic systems: connecting air lines, cylinders and valves on automation rigs.

How to Specify Push-In Pneumatic Fittings for Your Application

  • Size: Match the nominal size to the mating thread or hole. This product spans 4–16; check the full table below for the exact dimensions of each size.
  • Thread & pressure: Match the thread form (BSP/NPT/metric) and pressure rating to the line, and seal appropriately (tape, sealant or O-ring).
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to Industry standard. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

  • Seal tapered threads with PTFE tape or anaerobic sealant applied clear of the first thread; parallel threads seal on a washer or O-ring, not on the thread.
  • Tighten to the fitting manufacturer's torque — over-tightening tapered threads splits female ports.

Common Selection Mistakes with Push-In Pneumatic Fittings

  • Mating BSP and NPT threads directly — the 55°/60° forms do not seal against each other.
  • Exceeding the pressure rating of the lowest-rated component in the line.

Where Push-In Pneumatic Fittings Are Not the Right Choice

Do not mix thread forms (BSP into NPT) without an adapter, and do not exceed the pressure rating of the lowest-rated component.

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

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The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

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Specification
Business Information

Dimensions & Specifications (Industry standard)

Tube OD (mm)Thread sizeFlow ref (Nl/min)Max pressure (bar)Pull-out force (N)Reference standardNotes
4M5x0.8801070ISO 6150Push-in pneumatic fitting for PA/PU tubing
41/8 BSP801070ISO 6150Push-in pneumatic fitting for PA/PU tubing
6M5x0.820010120ISO 6150Push-in pneumatic fitting for PA/PU tubing
61/8 BSP20010120ISO 6150Push-in pneumatic fitting for PA/PU tubing
61/4 BSP20010120ISO 6150Push-in pneumatic fitting for PA/PU tubing
81/4 BSP35010180ISO 6150Push-in pneumatic fitting for PA/PU tubing
83/8 BSP35010180ISO 6150Push-in pneumatic fitting for PA/PU tubing
101/4 BSP50010250ISO 6150Push-in pneumatic fitting for PA/PU tubing
103/8 BSP50010250ISO 6150Push-in pneumatic fitting for PA/PU tubing
101/2 BSP50010250ISO 6150Push-in pneumatic fitting for PA/PU tubing
123/8 BSP70010350ISO 6150Push-in pneumatic fitting for PA/PU tubing
121/2 BSP70010350ISO 6150Push-in pneumatic fitting for PA/PU tubing
161/2 BSP120010500ISO 6150Push-in pneumatic fitting for PA/PU tubing
163/4 BSP120010500ISO 6150Push-in pneumatic fitting for PA/PU tubing
Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

Are Push-In Pneumatic Fittings made to a recognized standard?

Yes — they are manufactured to Industry standard, so dimensions are interchangeable between suppliers when you quote the standard on your order.

What are Push-In Pneumatic Fittings used for?

Joining and sealing fluid or pneumatic lines. They are supplied to Industry standard.

Which industries use Push-In Pneumatic Fittings?

They are commonly specified in maintenance & repair (mro), fabrication & metalwork and pneumatic systems, among other sectors.

How do I choose the right size of Push-In Pneumatic Fittings?

Match the nominal size to the mating thread or hole. This product is available from 4 to 16; the full dimension table on this page lists each size.

Can I get a quote for Push-In Pneumatic Fittings in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.