Series: NPT, External, RH/LH Regular Type 
Designation  | 
                    IC Inscribed Circle Dia.  | 
                    TPI Threads Per Inch  | 
                    RE Corner Radius  | 
                    INSL Insert Length  | 
                    PDX Profile Distance Ex  | 
                    PDY Profile Distance Ey  | 
                    IH Insert Hand  | 
        |
|---|---|---|---|---|---|---|---|---|
| 16EL11.5NPT | 0.375 | 11.5 | 0.004 | 0.649 | 0.059 | 0.043 | Left | |
| 16ER11.5NPT | 0.375 | 11.5 | 0.004 | 0.649 | 0.059 | 0.043 | Right | |
| 16ER14NPT | 0.375 | 14 | 0.003 | 0.649 | 0.047 | 0.035 | Right | |
| 16ER18NPT | 0.375 | 18 | 0.002 | 0.649 | 0.039 | 0.031 | Right | |
| 16ER27NPT | 0.375 | 27 | 0.002 | 0.649 | 0.031 | 0.028 | Right | |
| 16ER8NPT | 0.375 | 8 | 0.005 | 0.649 | 0.063 | 0.051 | Right |