Cat Pump Vent-Cap-V5

I let someone borrow my pressure washer and the vent cap for the pump and oil was sheared off and water had contaminated the oil bath inside the pump. The manufacturer was helpful, but they don't publish the specs on how the pump housing is tapped.

A trip to the hardware store found no bolts that fit in either imperial or metric so I completely reverse engineered the cap based on measurements from the broken piece and pictures.

Ironically, the company offered to send a replacement cap fo