| ASMUSS CODE | NB (inch) | 
|---|---|
| NITHD/015 | ½”x½” | 
| NITHD/020 | ¾”x¾” | 
| NITHD/025 | 1”x1” | 
| NITHD/032 | 1¼”x1¼” | 
| NITHD/040 | 1½”x1½” | 
| NITHD/050 | 2”x2” | 
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