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| Part Number | 170721-2 | 170725-2 | 170781-2 | 170728-2 | 170721-1 | 
|---|---|---|---|---|---|
| Manufacturer | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | TE Connectivity AMP Connectors | 
| Product Status | Active | Active | Obsolete | Obsolete | Obsolete | 
| Terminal Type | Circular | Circular | Circular | Circular | Circular | 
| Stud/Tab Size | M5 Stud | M5 Stud | M5 Stud | 1/4 Stud | 8 Stud | 
| Thickness | 0.031" (0.79mm) | 0.039" (0.99mm) | 0.031" (0.79mm) | 0.047" (1.19mm) | 0.031" (0.79mm) | 
| Width - Outer Edges | 0.315" (8.00mm) | 0.374" (9.50mm) | 0.315" (8.00mm) | 0.472" (12.00mm) | 0.315" (8.00mm) | 
| Length - Overall | 0.630" (16.00mm) | 0.787" (20.00mm) | 0.827" (21.00mm) | 0.945" (24.00mm) | 0.630" (16.00mm) | 
| Mounting Type | Free Hanging (In-Line) | Free Hanging (In-Line) | Free Hanging (In-Line) | Free Hanging (In-Line) | Free Hanging (In-Line) | 
| Termination | Crimp | Crimp | Crimp | Crimp | Crimp | 
| Wire Gauge | 16-22 AWG | 10-12 AWG | 18-22 AWG | 8 AWG | 16-22 AWG | 
| Insulation | Non-Insulated | Non-Insulated | Insulated | Non-Insulated | Non-Insulated | 
| Features | Serrated Termination | Serrated Termination | - | Serrated Termination | Serrated Termination | 
| Color | - | - | Red | - | - | 
| Contact Material | Copper | Copper | Copper | Copper | Copper | 
| Contact Finish | Tin | Tin | Tin | Tin | Tin |