Applications include: Exhaust gas temperature (EGT), NOx (Nitrogen Oxide), oxygen (O2) & particulate sensors. Sizes: M12 x 1.25, M14 x 1.5, M22 x 1.5, M16 x 1.5, M18 x 1.5, M20 x 1.5 & M22 x 1.5. Also available individually, 9003 (M12 x 1.25), 9004 (M14 x 1.5), 9005 (M16 x 1.5), 9006 (M18 x 1.5), 9007 (M20 x 1.5), 9008 (M22 x 1.5).