Coupler

One of the common joint connection - COUPLER. It is a connector to join 2 pieces of bar together.

Coupler is used on certain circumstances. Construction constraint, heavy congested of lapping bar, provision for new element connection, etc.

The inner part of the coupler is spiral threaded to allow next connection bar.

Some grease is applied on thread to smoothen the connection bar in tightening.


External feature or shape of coupler can be in Hexagon shape to ease tightening whereby spanner can be used.

Somehow some parallel feature of coupler pattern is still applicable. Chain wrench can be used for tightening purpose.

No surprise to see this material, as more to come in future as technology goes on.