Speedhut A-250 Metric Adapter (1/8 inch NPT Female to M12X1.5 Male, for Pressure Senders) Fitting, Metric Adapter, 1/8" NPT Female Thread to M12x1.5 Male Thread. For use with Speed hut pressure gauges. Fits Speed hut pressure senders: sender-01, sender-02, and sender-09 Fitting for Speed hut temperature sender: f-adaptor-12