Elesa+Ganter NT. nuts for levelling elements Standard executions - NT: zinc-plated steel. - NT-SST: AISI 304 stainless steel. Conformity UNI 5588 DIN 934. Features and applications AISI 304 stainless steel, with low sulphur contents (less than 0.030%) is particularly resistant to corrosion. NT. nuts are particularly suitable for applications on machines and equipment in those sectors where laws or particular hygienic, climatic and environmental factors make it mandatory to use corrosion resistant materials.