LC and LT are very similar connectors. The difference between the 2 connectors is the following:
1. The Teflon diameter around center pin on LC is 0.695" and around LT is 0.62".
2. The Chassis Connector has wider opening on LC than LT to accommodate the larger Teflon around center pin.
NOTE: If you have any question as to which version you have, you can take Micrometer and measure the Teflon diameter or center connector opening,