Bar Fly aluminum Sled Nut (T-nut), with M3x18mm socket head bolt. Fits Bar Fly Race Direct and Bar Fly 4 Direct Max. Both of these mounts are aluminum. The Sled nut fits the original injection molded Direct mounts, but requires a shorter bolt.
Bar Fly Direct mounts are compatible with Felt, Cervelo, Fizik, and 3T ARXII stems only. If you add a light (not recommended), use a safety strap.