This adapter fitting has a 3/8 BSP female port for connecting the sensing bulb on our Racetech mechanical temperature gauges. The machined aluminum adapter has a beaded nipple at each end to fit any of our 25mm / 1" ID silicone coolant hoses.
Note: Make sure that the end of your temperature sensing bulb does not touch the opposite side of the adapter! A 7/16" diameter relief has been milled into the fitting opposite of the tapped hole to accommodate a typical sensor bulb. The maximum allowable bulb length is 1 1/4", as measured from the flat port face.