Towing Equipment› Trailer Wiring and Electronics

Pollak Engineered

PRECISION BALL SWITCH

$27.70

SKU: P01M 21-517

In Stock
In Stock
Ships by Jun 19
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Pollak 21-517 is a precision ball switch designed for heavy-duty safety and control systems in transportation, trucking, and industrial applications. This Normally Closed (NC) switch maintains a closed circuit until its ball plunger is depressed, making it suitable for applications like safety interlocks and neutral sensing.

It features universal .250" blade terminals for easy integration with standard female connectors and has a rugged, corrosion-resistant body with an O-ring seal for protection against contaminants and moisture.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandPollak Engineered
Part NumberP01M 21-517

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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