Bently Nevada 21000 Series · Official-source verified 21000-34-05-00-015-04-02Proximity Probe Housing Assembly A configured aluminum external-mount housing assembly for a 3300 XL 8 mm reverse-mount proximity probe. The complete ordering code defines the probe, lead length, penetration, fittings and machine-case mounting thread. 3300 XL 8 mm 0.5 m cable 1.5 in penetration 3/4-14 NPT Exact-match reminder: match all six option blocks on the nameplate. Similar-looking 21000