Hutchinson Le Joint Français Rubber : DF851 & washer : Mild Steel Bonded Seals O-Ring, 21.54mm Bore, 28.58mm Outer

The Hutchinson Le Joint Français bonded seal consist of a metal insert with a profile of vulcanized rubber compound bonded to the inside diameter 21.54 mm, 28.58 mm external diameter, 2.50 mm thickness has FKM DF851 rubber family and mild steel metal washer with black rubber color also suitable for sealing under the heads of bolts and screws, for pipe couplings.

Size standard C20.63
Bolt 13/16, BSP 1/2
Operational temperature range -25 °C / 200 °C
Very good resistance - mineral oils, domestic gas, heat
Poor resistance - brake fluids, bases
Good impermeability