What are the defaults for mongo_client's socketTimeoutMS, connectTimeoutMS and waitQueueTimeoutMS?

The docs for mongo client here don't mention default timeouts:
http://api.mongodb.org/python/current/api/pymongo/mongo_client.html#pymongo.mongo_client.MongoClient

Searching through the code, I couldn't quickly figure out what the defaults were, so it would be nice to see them in the docs here. https://github.com/mongodb/mongo-python-driver/blob/88e3121d2896415cdf7bc95da4e2ec7c956fcf4c/pymongo/mongo_client.py#L137-L143

Thanks!