Initially, I just purchased online, but ordered the wrong part. I called and talked to a real person, who helped me order the correct part and offered a reasonably priced return shipping label. That was a welcome change from other recent online purchase interactions.
Flexzilla 1/2" Air Hose Fitting with 3/8" MNPT RP900500S
This Flexzilla PRO Air Hose Fitting with Swivel is a 1/2" fitting with 3/8" MNPT. Flexzilla Pro reusable fittings and splicers allow you to quickly repair Flexzilla hose on the job site or to create a custom-length hose in just three easy steps. Each Flexzilla Pro fitting includes an anodized aircraft aluminum fitting and a spiral bend restrictor to increase hose flexibility. This features a 360-degree swivel action increasing mobility in tight working spaces and increases the longevity of the main hose.
Features
• Made of aeronautical anodized aluminum.
• Spiral bend restrictor for flexibility.
• Material: Anodized Aircraft Aluminum
• 1/2" Fitting with 3/8" MNPT
• Field repairable.
• Compatible with Flexzilla Garden or Pro water hose.