Answer
Feb 12, 2026 - 06:55 AM
For a 3/8 inch air hose, you typically need a ferrule that is sized for 3/8 inch inner diameter (ID) hose. The actual outside diameter (OD) of the hose may vary depending on the material and brand, so it's best to measure your hose and choose a ferrule that fits snugly over the hose end. Most commonly, a 3/8 inch hose will use a 3/8 inch ferrule.
