Conmetall 127 Spring Washer 4mm, Galvanised.
Spring washers act as a lock washer by pressing against the nut face to resist loosening under vibration. Used on machinery, engines and any bolted joint subject to movement.
Fit between the nut and the flat washer and tighten fully so the washer sits flat. Supplied in a barcoded Conmetall retail prepack.
