Rondella di bloccaggio con dentatura esterna m4 zn De Dietrich 96140050

When securing components in boiler and burner assemblies, reliable fastening is essential to prevent loosening from vibration. This external tooth lock washer in M4 size with zinc plating provides a simple yet effective solution for creating a secure mechanical lock between a nut and the mating surface. The external teeth bite into both the fastener and the part, resisting rotation even under thermal expansion or mechanical stress. Ideal for use in gas burner parts and heating equipment components where space is limited, this washer helps maintain consistent clamping force during boiler maintenance and repair. The zinc coating offers moderate corrosion resistance, making it suitable for indoor heating environments. Whether you are replacing worn hardware or assembling new burner spare parts, this lock washer ensures your connections stay tight and reliable.