5/16-24 UNF threads are popular thread types because they can be connected to both 1/8" and 3/16" OD capillaries with appropriate flat-bottom fittings.
3/16" OD capillaries are usually used for flow rates of a few liters per minute. Above this, 1/4" OD tubing is often used.
To integrate devices with a 5/16-24 UNF thread into 1/4" tubing systems, adapters are required.
The table below gives a recommendation for this.
In any case, make sure that the flow-through equipment is designed for the intended flow rates!
| Flow rate regime | Recommended tubing OD | Small part recommendation to connect to 5/16-24 UNF port |
|---|---|---|
| Up to 100 ml/min | 1/16" | Adapter A7235 + fitting A58291 and ferrule A58292-1 |
| Up to 500 ml/min | 1/8" | Fitting A7236 and ferrule A58294 |
| Up to 3 000 ml/min | 3/16" |
Fitting and ferrule A142700 |
| Up to 15 000 ml/min | 1/4" |
Adapter kit A70701 |
