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 fieldRow 1Row 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.

Send selected rows for drawing review