Half Inch pipe tap handle converter

I needed a 1/2 inch to 3/8 inch converter for an impromptu tap handle. Couldn't find one so remixed a pipe connector real quick in 3D Builder. Printed with 4 walls and 50% infill to make sure it was strong enough to hold up to the use and weight of the black iron pipe that became the makeshift tap handle. No threads on the inside wall of the 3/8" converter. I was worried that the printer wouldn't do em at such a small scale and figured the tap would cut its own threads, which it did just fine. S