Brass NITTO Mini Cupla designed specifically for oxyacetylene equipment, UNF threads are either left hand for use with Fuel Gas or right hand for use with Oxygen. 
- Plated steel plug
 - For oxyacetylene use
 - Left hand and right hand UNF threads prevent incorrect connection
 
Application:
- Oxyacetylene equipment
 - Acetylene bottle
 - Oxygen bottle