Prevailing torque type hexagon nuts with non-metallic insert, low type,for use at temperatures from -50 to +120 °C, *< M 6 min. coating thickness 5µm, ** SL = sealer and lubrication with µ = 0,12 - 0,18, salt spray test: 120h WR, 264h RR,DIN 985 ➡ replaced by ISO 10511,