ACCESSORIES, Dashboard Panel Overlay, FITTING, ADAPTER, M16X1.5 MALE, BRASS, FOR MECH. TEMP. GAUGE, Constructed from solid brass, Constructed from solid brass, 5/8" -18 UNF TO M16x1.5 METRIC Adap, 5/8" -18 UNF Female (adapts directly to sealing nut on AutoMeter Mechanical Temp Gauges) to M16x1.5 Male, M16x1.5 MECH TMP FIT