When sourcing ODC (Outdoor Connector) fiber optic connectors, the most critical technical factor is the IP67 or IP68 ingress protection rating, which ensures the connector is dust-tight and protected against water immersion. Buyers must also verify the Insertion Loss (IL ≤ 0.5dB) and Return Loss (RL ≥ 45dB for PC, ≥ 60dB for APC) to ensure signal integrity. Additionally, confirm the mechanical durability, typically requiring a minimum of 500 mating cycles, and the material composition, such as stainless steel or nickel-plated brass housings, to prevent corrosion in harsh environments.