Fuel/Water Separator Spin-on with Drain and Sensor Port Notes: CAUTION: Furnished O-Ring must be installed on post for seal. Contains: Sensor Port Thread: 9/16-18 Standpipe Fits: Caterpillar Equipment Replaces: Caterpillar 326-1644 Thread: 1-14 O.D.: 4 1/4 (108.0) Length: 7 5/8 (193.7) I. Gskt.: [1] Included O. Ring: [2] Included