| 摘要 |
The body (24) of the insert has an overhanging collar region (34) and an external thread (26) for attaching the insert via a nut (28) to the front panel. An annular groove (42) is provided for a sealing piece (46). The groove is located in the collar region. The sealing part encloses the insert like a cap. The edge of the sealing piece is snapped into the groove. A holding ring (50) is placed around the sealing piece both from the front panel direction, and a direction parallel to the front panel. The holding ring and the collar surface (36) press together when assembled. The sealing part may be transparent.
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