M10 x 1.5 Serrated Flange Lock Nut DIN6923-10 Plated M10-1.50 serrated flange nut cl 8 din 6923 plated MSFN10 $0.150/ea
M12 x 1.25 Serrated Flange Lock Nut - Plated M12 x 1.25 serrated flange lock nut - plated MSFN121.25 $0.390/ea
M10 x 1.25 Flange Nut (Class 8) DIN 6923- Plated M10-1.25 flange nut (fine) cl 8 din 6923 plated MFN101.25 $0.207/ea