M3-M12 Inserto Tappo Filettato Dado di Bloccaggio Esagonale con Inserto Nylon Dado Acciaio Inox 316
Thread specification:M12. Nut material: 316 stainless steel. Thread specification: M3. It is a nut with a nylon insert that resists turning. The insert deforms elastically over the threads of the screw, but threads are not cut into the nylon.