These are OK but need higher melting point plastic. Its hard to get the connector AND 8 gauge wire hot enough to flow solder

These are OK. I wish they were made with a higher melting point plastic for the shell. Even with pre-tinning and liquid flux it is really hard to quickly get the connector AND the 8 gauge wire hot enough to flow solder. By then the plastic is soft and the metal connector elements float around in the housing. I have had several fail to engage with their mating connector after one or both of the metal pins came out of alignment.

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