Description
Brass Brake Pipe 3-Way T-Piece M10 x 1.25mm Female
Solid brass 3-way brake pipe T-piece with three M10 x 1.25mm female ports, for 3/16″ (4.75mm) pipe. For cars that use the coarser M10 x 1.25 brake thread – typically older Fiat and Lancia models. Supplied by EMS Spares, Leicester – over 30 years in automotive components.
Specification
| Thread | M10 x 1.25mm female, 3 ports |
|---|---|
| Pipe size | 3/16″ (4.75mm) brake / clutch pipe |
| Type | 3-way T-piece (tee) |
| Overall size | N/A |
| Material / finish | Solid brass, natural finish – rust resistant, will not seize |
| Interchange reference | HU35* |
| EMS part number | EMS-A35 |
* Reference numbers are for identification and cross-reference only. EMS Spares is an independent UK supplier and has no connection with the owners of these part numbers. All dimensions are approximate.
Buyer’s guide: brake pipe T-pieces explained
What does a brake T-piece do?
A multi-way brake pipe connector splits one brake pipe into several – for example front-to-rear splits, dual circuits, or adding a brake light switch or pressure gauge. Each port takes a male union on a flared pipe, which seals against the seat inside the port.
Step 1 – identify your thread (the most common mistake)
| Thread | Outside diameter (male part) | Threads | Typically found on |
|---|---|---|---|
| M10 x 1mm | 10mm approx | 1mm pitch (about 25 per inch) | Most European and Japanese cars, many later British cars and kit cars |
| M10 x 1.25mm (this part) | 10mm approx | 1.25mm pitch | Some older Italian and French cars (e.g. Fiat, Lancia) |
| 3/8″ x 24 UNF | 9.5mm approx | 24 per inch | Most British classics: MG, Triumph, Mini, Land Rover Series |
| M12 x 1mm | 12mm approx | 1mm pitch | Larger ports, some master cylinders and 1/4″ pipe |
Tip: M10 x 1.25 and M10 x 1 look almost the same and will start to screw together, then bind. Check the pitch with a thread gauge: 1.25mm (this part) or 1mm. Never force a fitting.
Step 2 – ports and unions
- Female ports (this part): each port takes a male M10 x 1.25 union on a flared pipe.
- For the more common M10 x 1 thread use our EMS-A32 T-piece.
Step 3 – pipe size and flare
For 3/16″ (4.75mm) outside-diameter pipe, the standard UK car brake pipe size. Suits copper-nickel (Kunifer), copper and steel brake pipe. Match the flare on your pipe to the port it screws into – most metric ports take a DIN (inverted) or ISO bubble flare; if in doubt, copy the flare on your old pipe.
How to fit – good practice
- Clean the ports and check each seat is free of dirt.
- Start every union by hand for several turns – it should turn freely. If it binds, stop and check the thread.
- Hold the fitting with one spanner while you tighten each union with a split / flare nut spanner, so the fitting does not twist or load the pipes.
- Clip the fitting or pipes securely so they cannot vibrate.
- Bleed the brakes, then check every joint for leaks with the pedal pressed hard.
Safety: brakes are a safety-critical system. If you are not confident, have the work done or checked by a qualified mechanic.
Pack sizes
Available as a single T-piece.
Delivery
Free UK delivery on every order (including Northern Ireland, Highlands & Islands). Same-day dispatch on orders placed before 10am.
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FAQ
Is M10 x 1.25 the same as M10 x 1? No. Same diameter, different pitch – they are not interchangeable. For M10 x 1 see our EMS-A32.
Will this fit copper (Kunifer) pipe? Yes – any 3/16″ (4.75mm) brake pipe.
Why brass and not steel? Brass does not rust or seize, so fittings can be undone again years later.
Need help? Message us with your vehicle and the part you are connecting to and we will confirm the right fitting before you order.
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