knurled nuts, high type similar to DIN 466 Stainless steel M6. Similar to DIN 466 (enclosed drawing) but with different sizes if possible: d= M6 ds = 10 (not 12) h = 10 (not 15) dk = 18 (not 24) k = 5 mm. We need 100/150 pcs. to test in, then other orders of minimum 1000 Pcs will follow.