MARYLAND METRICS
THREAD DATA CHARTS
| MARYLAND METRICS -- THREAD
DATA CHART: ELECTRICAL THREAD -- BRITISH ET (Conduit to BS 31) |
|||
| Imperial Conduit (ET) to BS 31 | |||
| Thread | Nominal | Major | Threads |
| Designation | Size | Diameter | per |
| mm | inch | ||
| ET | ET | d=D | tpi |
| ET 5/8 | 5/8 | 15.88 | 18 |
| ET 3/4 | 3/4 | 19.05 | 16 |
| ET 1 | 1 | 25.40 | 16 |
| ET 1 1/4 | 1 1/4 | 31.75 | 16 |
| ET 1 1/2 | 1 1/2 | 38.10 | 14 |
| ET 2 | 2 | 50.80 | 14 |
| ET 2 1/2 | 2 1/2 | 63.50 | 14 |
| ET 3 | 3 | 76.20 | 14 |
| filnam:ETthd.xls ver x2g | |||
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