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BS/BT Dimension Comparison Explorer
Select two supplied catalogue rows to compare their lettered dimensions, mounting thread, port and variant note. Letter codes must be read against the matching Simitch drawing.
| Catalogue field | Row 1 | Row 2 |
|---|
Dimensional values are shown in millimetres unless the cell is a thread or port designation. A dash means the supplied workbook cell was blank.
Comparison boundary
Different rows do not prove a fixed BS-versus-BT construction rule. Confirm the installation envelope, power stroke, force family, ports, rod connection and controls before release.


