Brass Flare Nut
Shipping and Delivery
Shipping and Delivery
| Product Type | Delivery Method | Preparation Time | Transport Time | Delivery Time |
|---|---|---|---|---|
| All Parts | Pickup Point | 0 to 3 days | 3 to 6 days | 3 to 9 days |
| All Parts | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 90cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes < 200cm | Home Delivery | 0 to 3 days | 3 to 5 days | 3 to 8 days |
| Tubes > 200cm | Home Delivery | 0 to 6 days | 6 to 10 days | 6 to 16 days |
| Assembled Products | Home Delivery & Pickup Point | 0 to 5 days | (see methods) | 3 to 11 days |
* Tubes longer than 90cm cannot be delivered to a pickup point
For confirmation of delivery times on specific items, please send us a message
Brass Flare Nut
Brass flare nut for connecting copper tubes to threaded fittings. This nut is used with a copper tube whose end has been flared to create a leak-tight mechanical joint. ISO 228-1 BSPP thread.
Description of the Brass Flare Nut
This flare nut screws onto a male fitting and presses the flare (flared end) of a copper tube against the seat of the fitting. This system creates a reliable, removable mechanical seal, without soldering or brazing.
Each reference combines a thread (matching the fitting) and a tube diameter (matching the copper tube to be connected). Check the compatibility between the thread of your fitting and the outside diameter of your copper tube.
Technical Specifications
| Material | Brass CW617N - 4MS |
| Colour | Gold-coloured brass |
| Nominal pressure | PN 16 bar |
| Thread standard | ISO 228-1 - BSPP Gas (parallel thread) |
| Sealing | Guaranteed flat gasket sealing (thickness from 1 mm) |
| Gasket seats | Between the flare of the tube and the seat of the male fitting |
| Shape | Hexagonal |
| Type | Female (tapped) — for flared copper tube |
| Connection | Flare on copper tube |
| Compatibility | Copper tube (outside diameter according to reference) |
| Compatible fluids | Drinking water, glycol water, compatible fluids |
| Temperature | Depending on the type of sealing chosen |
| Application | Drinking water supply, general plumbing, HVAC |
Operating Conditions and Installation
- Operating pressure: PN 16 bar
- Temperature: Depending on the type of sealing chosen
- Fluids: Drinking water, glycol water, compatible fluids
- Installation: Apply moderate tightening torque and choose suitable materials (risk of galvanic corrosion). Wrench flats sized to fit standard spanners.
Certifications and Compliance
- Drinking water: Compliant with the French decree of 25 June 2020 on metallic materials and products intended for installations in contact with water for human consumption.
- 4MS: Compliant with 4MS requirements — Harmonisation of European certification rules for materials and products in contact with drinking water.
Applications and Installation Tips
Uses
- Copper tube connection: joining a copper tube to a threaded fitting with a flare
- Domestic plumbing: connecting hot and cold water systems
- Industrial plumbing: PN 16 bar compliant installations
Installation tips
- Slide the nut onto the copper tube before making the flare
- Check the compatibility between the nut thread and the outside diameter of the copper tube
- Tighten with an open-end spanner or an adjustable spanner — do not use slip-joint pliers, to avoid marking the part
- Apply a moderate tightening torque — overtightening can deform the flare
Technical Drawing
Dimensions (mm)
All dimensions are given in millimetres (mm) unless otherwise stated.
| G | G (mm) | OD | L |
|---|---|---|---|
| 3/8" | 12x17 | 8.2 | 9.5 |
| 3/8" | 12x17 | 10.2 | 9.5 |
| 3/8" | 12x17 | 12.2 | 9.5 |
| 1/2" | 15x21 | 10.2 | 11 |
| 1/2" | 15x21 | 12.2 | 11 |
| 1/2" | 15x21 | 14.2 | 11 |
| 1/2" | 15x21 | 16.2 | 11 |
| 3/4" | 20x27 | 12.2 | 12 |
| 3/4" | 20x27 | 14.2 | 12 |
| 3/4" | 20x27 | 16.2 | 12 |
| 3/4" | 20x27 | 18.2 | 12 |
| 3/4" | 20x27 | 20.3 | 12 |
| 1" | 26x34 | 20.3 | 14 |
| 1" | 26x34 | 22.3 | 14 |
| 1"1/4 | 33x42 | 26 | 17 |
| 1"1/4 | 33x42 | 32 | 17 |
Available Size Combinations
This flare nut is available in the following thread / tube diameter combinations.
| Thread | Tube diameter |
|---|---|
| 3/8'' | Ø8.2 |
| 3/8'' | Ø10.2 |
| 3/8'' | Ø12.2 |
| 1/2'' | Ø10.2 |
| 1/2'' | Ø12.2 |
| 1/2'' | Ø14.2 |
| 1/2'' | Ø16.2 |
| 3/4'' | Ø12.2 |
| 3/4'' | Ø14.2 |
| 3/4'' | Ø16.2 |
| 3/4'' | Ø18.2 |
| 3/4'' | Ø20.2 |
| 1'' | Ø20.3 |
| 1'' | Ø22.3 |
| 1''1/4 | Ø32 |
The appearance of the part may vary depending on the batch in stock (see photos). Contact us for confirmation.
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