1/2" Brass Flare Nut

What is “NS4”

• NS4 is the code Refcomm use for the short brass flare nut range.


• These are brass flare nuts used in refrigeration/flaring systems. Material is brass; the “flare” style means they are used to join flared tubing ends.

Key Features / Considerations

• Material: Brass. Durable, good for refrigeration, corrosion‑resistant.


• Short Nuts: NS4 are “short,” meaning the length of the nut is minimal. That’s useful in tight spaces.


• Standards: These flare nuts follow standard flare/NPT/SAE type sizing. Compatible with standard flare‑tubing fittings.


• Applications: Refrigeration, air conditioning, wherever flared tube joints are needed.