We offer hex nut. Material : stainless steelgrade : a2-70, a2-80, a4-70, a4-80, 200 seriesstandard : metric- din 934 , iso 4032 , is 1363 , is 1364inches-bs 1083 , ansi b18.2.2size in dia : metric-m2 m100inches- 18" 4"manufacturing by : cold forminghot forming