BEST Fittings Thumb Push Bleed Upgrade for MDE Jubilee Gun Charging Valves with M10x1 Screw Bleed Thread. Quick Action Air Dump. No more sore fingers or frustration from not being able to get your screw bleed valve to seal. Simply unscrew your old screw type bleed, install the spacer seal into the port and screw the new unit into place. Tighten with a spanner to orient the valve to your preferred position and away you go.