Vespel SP21 - If insulation is less important than low-friction properties, then you're looking for graphite-enhanced SP-21.  Automotive engineers love to use SP-21 for parts like thrust washers, bearings and seals - because the low-friction properties mean they work with or without lubrication.

Superior wear and low-friction properties for:

Thrust washers
Seal rings
Valve seats
Bearings
Seals

Benefits

Low wear at high bearing PVs
Low coefficient of friction
Long-term thermal stability
High stiffness
Low elongation
Outstanding performance with or without lubrication
Good strength and impact resistance