Details
The Barrow TBJB3-4 is a soft tube reducer that joins a tube with a 1/2" inner diameter to a tube with a 3/8" inner diameter. Barrow calls it a 1/2" to 3/8" tube adapter. Each end is a ribbed barb that the tube is pushed over, with a diamond-knurled collar in the middle, and the body is H59 brass finished in black.
Properties
- Type
- Soft tube reducer, barb to barb
- Tube sizes
- 1/2" ID to 3/8" ID
- Threads
- None
- Size
- 27.6 mm long, barbs 14.5 mm and 11.2 mm
- Material
- H59 brass, electroplated
- Color
- Black
- Pieces in the pack
- 1
Join two tube sizes
Push a 1/2" ID tube over the large barb and a 3/8" ID tube over the small one, and the two runs are joined without any threaded part in between. That helps when a loop mixes tube sizes, for example when a part comes with short 3/8" hoses.
Ribbed barbs
Each end has raised ribs that grip the inside of the tube. For extra security you can add a hose clamp over each tube end; clamps are not included.
Brass with a double-protected finish
Barrow says it uses H59 brass for the body and protects the surface with a double electroplating process, which it says gives a fine texture that is solid and durable.
Non-slip diamond knurling
The center collar has a diamond knurl. Barrow says it gives a sure grip when you handle the fitting.
Technical data
| Model | TBJB3-4 |
| Type | Barb to barb reducer |
| Large end | Barb for 1/2" ID soft tube, 14.5 mm diameter, 11.4 mm long |
| Small end | Barb for 3/8" ID soft tube, 11.2 mm diameter, 11.5 mm long |
| Center collar | 4.7 mm |
| Overall length | 27.6 mm |
| Material | H59 brass |
| Color | Black |
Notes
- Barrow made this reducer in black, white and shiny silver. This listing is the black version.
- Barrow notes that it may update the look or construction of the part without notice; the part you receive is the current version.
In the box
- 1x Barrow 1/2" to 3/8" Barbed Reducer Fitting - Black





