Quality Requirement of Rebar Coupler

1. The surface of rebar coupler is no cracks, with full thread, and no other defects.

2. Thread type is qualified checked by gauge, and use straight thread plug gauge to check its size precision.

3. Must have clear size marks on all kinds of surface of rebar coupler. If rebar coupler is reducing coupler, still mark size on two sides.

4. Cover plastic bag on two sides of rebar coupler, in order to ensure the clean and dry, which will prevent rust.