| Series | 557 | 
                                        
                                            | Certifications | RoHS, Watertight to Mil-L-3661B Spec | 
                                        
                                            | Status | Active | 
                                        
                                            | Features | Watertight | 
                                        
                                            | Mounting Hole Size | 0.687" (17.45mm) | 
                                        
                                            | Output | Single Color | 
                                        
                                            | Emitted Color | Blue | 
                                        
                                            | LED Position | Internal | 
                                        
                                            | Lens Style | Flat | 
                                        
                                            | Lens Color | Non-Tinted, Diffused | 
                                        
                                            | Voltage | 12 VDC | 
                                        
                                            | Mounting Method | Nut/Washer | 
                                        
                                            | Max Panel Thickness | .156" (3.96mm) | 
                                        
                                            | Mounting Torque | 15 | 
                                        
                                            | Mounting Torque Unit of Measure | lb-in | 
                                        
                                            | Typical Current (mA) | 16 | 
                                        
                                            | Typical Intensity (mcd) | 1200 | 
                                        
                                            | Termination | 5.5" Wire Leads | 
                                        
                                            | Lead Wire Gauge | 24 AWG | 
                                        
                                            | Housing Material | Polycarbonate | 
                                        
                                            | Lens Material | Transparent Polycarbonate (UL 94V-0) | 
                                        
                                            | Lock Washer | White Nickel | 
                                        
                                            | Nut | White Nickel | 
                                        
                                            | Operating Temperature | -25°C to +85°C (-13°F to +185°F) | 
                                        
                                            | Storage Temperature | -30°C to +100°C (-22°F to +212°F) | 
                                        
                                            | Polarity Sensitive | Yes |