MX-44540 Motor Brush Replacement fits 87740 RIDGID 300 535 Pipe Threading MachinesFor use in RIDGID® 300 or 535 Pipe Threading Machines. Brushes fit RIDGID® 87740 motor. Part number 44540.(2) Replacement Motor BrushesReplaces Brushes in RIDGID® 300 87740 115v MotorReplaces Brushes in RIDGID® 300 Com..