Cam Lock Coupling- also known as cam and groove, snow couplings, or quick-disconnect couplings.
Two-part design for expansion ring couplings
The body of the coupling is made from extruded 6061-T6 aluminum 
Hard anodized with with investment stainless steel arms and pull rings
Expansion ring couplings cannot be used in the transportation or distribution of fuel due to copper or copper alloy content in the expansion rings.