2/5pcs M2 M3 M4 M5 M6- M12 M20 304 Stainless Steel Inside Outside Thread Adapter Screw Nuts Insert Sleeve Converter Nut CouplerHome Improvement > Hardware3,62 USD (≈ 2,98 CHF)3,93 USDDisponibileSold by AliExpress WWVai al negozio