With this convenient kit you can know that you'll have the right threaded retainer to hold this Temperature Sender into the Thermostat Housing. Your current one might be a different brand and therefore size, or may just simply be corroded, as most of them do over time. Includes a new Water Temperature Sender (16-7110), and one Retainer (16-7115).
Datsun 240Z, 260Z, 280Z, 280ZX
Datsun S30, S130
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983