Machined aluminium cord connector in NPT hub sizes 1/4 through 1 inch and cast aluminium 1 to 3 inch. They provide durable performance and a clean attractive look without adding unwanted weight. One-piece design with machined threads. 3/8 inch NPT hub. 90° male cord connector body style. F1 form size. -34 to 107°C effective operating temperature. 0.67 to 0.7 inch recommended knockout hole size. Suitable for use in hazardous locations per class I division 2, class II division 1 and 2, class III division 1 and 2 NEC reference 501-4 (b), 502-4 (a), 502-4 (b), 503-3 (a) and 503-3 (b). Lock nuts sold separately.