Foot mounting HNC-40 Size=40, Based on the standard=ISO 15552 (previously also VDMA 24652, ISO 6431, NF E49 003.1, UNI 10290), Conforms to standard=ISO 15552 (previously also VDMA 24652, ISO 6431, NF E49 003.1, UNI 10290), Corrosion resistance classification CRC=2 - Moderate corrosion stress, Ambient temperature=-40 - 150 degC