Bently Nevada · 21000 Series Part No. 21000-34-05-00-056-04-02 Bently Nevada 21000-34-05-00-056-04-02 Proximity Probe Housing Assembly · 3300 XL 8 mm External mounting assembly for a 3300 XL 8 mm proximity probe, configured with connector protector, 0.5 m probe cable, no standoff adapter, 5.6 in probe penetration and 3/4-14 NPT mounting thread. Probe 3300 XL 8 mm Cable 0.5 m / 20 in Penetration 5.6 in Mounting 3/4-14 NPT 01 Technical Specifications Key mechanical and probe