Pollak 21-537 Precision Ball Switch – Normally Open (NO), M14 x 2.0 Metric Thread (Fits WP 12015792)

Product Description High-Performance Metric Switching for Heavy-Duty Environments

The Pollak 21-537 Precision Ball Switch is a premium-grade sensing solution designed for modern vehicle architectures requiring metric fitment. This Normally Open (NO) switch is engineered to provide reliable electrical activation for critical systems, ensuring peak performance in trucking, agricultural, and industrial applications.

Weatherproof Connection & Metric Precision This model stands out with its M14 x 2.0 metric thread, making it the correct choice for specific transmissions and engine blocks that do not use standard SAE sizing. To ensure a lifetime of service in harsh conditions, the 21-537 features sealed terminals designed to mate perfectly with the Packard Weather Pack (WP 12015792) connector. This combination provides a watertight, dust-proof seal that prevents corrosion and electrical failure caused by road salt and moisture.

Pollak Durability You Can Trust Constructed with a rugged, zinc-plated body and featuring an encapsulated design, the 21-537 is built to withstand extreme vibrations and temperatures ranging from -40°F to +250°F. With a mechanical life of 1,000,000 cycles, it offers a "set-it-and-forget-it" reliability that reduces vehicle downtime and maintenance costs.

Key Specifications: 

• Circuitry: Normally Open (NO)

• Termination: Sealed Terminals (Mates with WP 12015792)

• Connector Series: Packard Weather Pack

• 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

• Sealing: Includes O-ring for a leak-proof installation.