M12 x 1.75 Serrated Flange Lock Nut DIN6923-8 Plated M12-1.75 serrated flange nut cl 8 din 6923 plated MSFN12 $0.252/ea
M10 x 1.25 Serrated Flange Lock Nut - Plated M10 x 1.25 serrated flange lock nut - plated MSFN101.25 $0.229/ea
M10-1.5 Flange Nylon Insert Lock Nut (8) - Plated M10-1.5 flange nylon insert lock nut (8) - plated MFNLN10 $0.202/ea