WOMSI 220pcs Stainless Steel Metric Lock Nut Kit, Nylon Insert Hex Lock Nut M3 M4 M5 M6 M8 M10 M12 for lock washers, polished finish, corrosion-resistant, conforms to DIN985, avoids loosening of bolts in harsh environments, as vibration and Impact.

WOMSI 220pcs Stainless Steel Metric Lock Nut Kit, Nylon Insert Hex Lock Nut M3 M4 M5 M6 M8 M10 M12 for lock washers, polished finish, corrosion-resistant, conforms to DIN985, avoids loosening of bolts in harsh environments, as vibration and Impact.