Pollak 21-566 Precision Ball Switch – Normally Open (NO), M14 x 2.0 Metric Thread (Fits MP 12052644)

High-Performance Metric Sensing for Heavy-Duty Applications

The Pollak 21-566 Precision Ball Switch is a premium electrical component engineered for modern vehicle platforms requiring metric fitment. This Normally Open (NO) switch is designed to provide immediate and accurate circuit engagement, making it an essential part for neutral sensing, backup lamp activation, and PTO interlock systems in the trucking and industrial sectors.

Metric Precision Meets Weatherproof Reliability The 21-566 features an M14 x 2.0 metric thread, designed specifically for transmissions and engine blocks that utilize metric hardware. To ensure long-term durability in harsh environments, it is equipped with sealed terminals that mate perfectly with the Metri-Pack 150 Series (MP 12052644) connector. This combination creates a watertight and dust-proof seal, protecting your electrical system from the corrosive effects of moisture, road salt, and grime.

Pollak Engineering Excellence Constructed with a rugged, corrosion-resistant body and an encapsulated design, the 21-566 is built to withstand extreme vibrations and temperatures ranging from -40°F to +250°F. With a mechanical life of 1,000,000 cycles, this switch offers the "set-it-and-forget-it" reliability that professional fleet managers and owner-operators demand.

Key Specifications:

• Circuitry: Normally Open (NO)

• Termination: Sealed Terminals (Mates with MP 12052644)

• Connector Series: Metri-Pack 150

• Thread Size: M14 x 2.0 (Metric)

• Hex Size: 7/8"

• Voltage Rating: 5.0 - 24.0 VDC

• Operating Temp: -40°F to +250°F (-40°C to +121°C)

• Cycle Life: 500,000 Electrical / 1,000,000 Mechanical

• Design: Assembled with O-ring for a leak-proof seal.