The Hutchinson Le Joint Français from Bi-material ring washer-rubber, the bonded seals are particularly suitable for sealing under the heads of bolts and screws, for pipe couplings (both high and low pressure). It has the advantage of being removable and reusable, as opposed to other seals. Inside diameter for seals is 20.7 and external diameter is 28.

Operational temperature range : -30 °C / 100 °C
Peak temperature 120 °C
Rubber colour is black