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