| PartNumber | 521781-1 | 521782-6 | 521780-1 |
| Description | Terminals PL MKIII 250 REC HSG 4P NYLON NAT | Terminals HSG,RECP,POSILOK, 250SER,3P/2C | Terminals POSI LOCK HSG MKIII |
| Manufacturer | TE Connectivity | TE Connectivity | - |
| Product Category | Terminals | Terminals | - |
| RoHS | Y | Y | - |
| Product | Accessories | Accessories | - |
| Type | Terminal Housing | Terminal Housing | - |
| Stud / Tab Size | - | - | - |
| Termination Style | Crimp | - | - |
| Gender | Male | - | - |
| Insulation | Insulated | - | - |
| Contact Plating | - | - | - |
| Contact Material | - | - | - |
| Length | 34.18 mm | - | - |
| Material | Nylon | - | - |
| Mounting Angle | Straight | - | - |
| Brand | TE Connectivity | TE Connectivity / AMP | - |
| Contact Gender | Socket (Female) | - | - |
| Product Type | Terminals | Terminals | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Terminals | Terminals | - |
| Part # Aliases | 521781-1 | 521782-6 | - |
| Unit Weight | 0.143988 oz | - | - |
| Series | - | Mark III | - |