This helmet hasteners doesn't fit for 3M Adflo, Speedglas 9100fx, Miller Infinity series, Lincoln K2800-1.
Due to different helmets designs, if you want to make the fasteners tighter, It's recommended to put external tooth lock washers on them and they will hold very strong. See our customers' experience sharing.
Body & knob made from lightweight 6061-t6 Aluminum, Better than plastic,Say goodbye to the worries of stripping out from your helmets.
Fit for the flip hood and replace easily damaged plastic fasteners. Fit for fiber-metal 2090 with 3C headgear too, welding hood fasteners pipeliner, and other welding helmets.
If you have any questions, please feel free to contact us for help and a Satisfactory solution.