Nut, Used for Switch, Relay, or Thermostats and so on, RoHS Compliant Materials: steel, ... , A194 4, and A563 DHSurface: plain, black, phosphate, zinc, hot dip galvanizing, dacromet, and TeflonPacking: standard exportCan produce according to standard ... well as non-standard ones Hex Nut with Phosphate, Hot Dip Galvanizing, and Teflon Surface