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CURT Coupler Lock
CURT Coupler Lock
CURT Coupler Lock
CURT Coupler Lock
CURT Coupler Lock
CURT Coupler Lock
CURT Coupler Lock

CURT Coupler Lock

Blocks your trailer coupler from opening so your trailer stays put and out of the wrong hands.
Curt MPN 23503
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

In-Store Exclusive

This one's worth the trip to the store.

This Curt item is one you'll find in stores rather than online — and that's often the better way to buy. In store you get the genuine article, full manufacturer warranty, and real advice from someone who's actually handled it — no counterfeits, no gray-market resellers.

  • Authorized dealer network · Full manufacturer warranty & support
  • Guaranteed authentic · No counterfeits, no gray-market resellers
  • The brands set these standards · Be wary of sellers who don't follow them
Why isn't this online? The whole story →

About Product Overview

This CURT coupler lock slides into place over your trailer coupler to block it from being opened, keeping your trailer put whether it's parked in the driveway or hooked up at a job site. The 0.25" shank diameter fits the coupler's latch mechanism, and the blue finish makes it easy to spot in a truck bed full of gear.

  • Brand: CURT
  • Color/finish: Blue
  • Shank diameter: 0.25 in.
  • Adjustable design
  • Sold individually, carded packaging

The Details Specifications

Brand Curt
Model / MPN 23503
UPC 612314235032
Weight Under 1 lb
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
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Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

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Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

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The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a familiar banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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