These are the proper GM-style sensors for use with the MegaSquirt line of ECUs and come with the weatherproof connector and crimp pins. One extra crimp pin is included as a spare. The threads are 3/8″ NPT pipe thread – note that isn’t an actual 3/8″ outer diameter but a pipe thread size based on pipe inner diameter.
IMPORTANT NOTE: The pins for this connector are pull-to-seat! This means you cannot push the pins into the connector from the back.