Universal Water Temperature Adapter Fitting Kit (9851) by Equus®. This four piece US Domestic and European engine mechanical temperature gauge adapter fitting kit from Equus includes 4 solid brass bushings to adapt from 5/8-18 UNF female threads to male 3/8-18 NPT, 1/4-18 NPT, 1/2-14 NPT, and M16x1.5 respectively. Adapter kit contains various sized adapters needed to install any oil, or water gauges by Equus . This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost.