A2Edelstahl Nylon Einsatz Sicherungsmutter Sechskant Nylockmutter linkes Gewinde

There are left Hand Thread Nylon insert Self-locking Nut. Thread Pitch. 1.75mm(M12). 0.7mm(M4) / 0.8mm(M5) / 1.0mm(M6) / 1.25mm(M8) / 1.5mm(M10).

eBay