King Pin Lock

Secures Dropped Semi Trailers From Unauthorized Coupling.

Why use a king pin lock?

Millions of dollars worth of cargo is stolen each and every year and the freight on trucks are becoming more and more valuable. Because of this, semi trailers are becoming more of a target for theft. King pin locks help secure semi trailers when they are not in use. This is a good security measure specially if the semi trailer is dropped in an unsecured location. King pin locks can also help indicate which semi trailers are ready to be moved by removing the locks from the trailers that are ready, and keeping the locks on the trailers that are not quite ready.

How do they work?

The king pin lock attaches onto and secures the king pin of a semi trailer, which connects to the hitch on a truck or tractor. With the king pin lock in place, it prevents unauthorized coupling and towing of the locked semi trailer. A warning flag is attached to the handle of the king pin lock, and it hangs down from the lock when it is attached to a dropped semi trailer. The hanging red flag warns drivers not to attempt coupling with the semi trailer, which avoids potential damage to the truck or tractor, the semi trailer, or the king pin lock itself. The attached handle of the king pin lock makes the lock easy to carry when it’s not in use, and it helps keep your hands clean from any grease that the lock may have accumulated from the trailer’s king pin.

King Pin Lock Models Compared

Cargo Protectors AM100 king pin lock.

King Pin Lock AM100

  • Stand alone king pin lock
  • Padlock not included
  • Accommodates padlocks with 1-3/4″ (44mm) wide body and 1-1/8″ (28mm) tall 5/16″ (8mm) diameter shackle

Please Note: King pin lock requires padlock in order to function.

Cargo Protectors AM101 king pin lock with American Lock model A5200 padlock and keys.

King Pin Lock AM101

  • King pin lock included with American Lock Model A5200 Padlock
  • Can be keyed alike, keyed different, or master keyed
  • Two operating keys included with each king pin lock
Cargo Protectors AM107 king pin lock complete with American Lock model A3200 padlock (without core).

King Pin Lock AM107

  • King pin lock with American Lock Model A3200 Interchangeable Core Padlock
  • Padlock can accommodate any SFIC Interchangeable Core (Sold Separate)
  • Interchangeable core can be pinned to any master system and installed upon request

King Pin Lock Storage Rack

Our Universal King Pin Lock Storage Rack keeps your king pin locks secured and stored out of the way when they are not in use. When the king pin locks are done being used, they are easily placed and secured in the locked position on the storage rack. The king pin lock cannot be removed from the storage rack without its key, which keeps the king pin lock stored out of the way without it getting in the wrong hands.

The King Pin Lock Storage Rack is compatible with all king pin lock brands. It’s crafted with 3/16″ thick steel with a gloss black powder coat finish for durability and longevity of use. The storage rack contains four mounting holes for universal mounting capabilities, and it is available with either three or five king pin lock placement hooks.

Cargo Protectors king pin rack with three placement hooks pictured with three Cargo Protectors king pin locks.
Cargo Protectors king pin rack with five placement hooks pictured with five Cargo Protectors king pin locks.

We Mean Business

You Are Top Priority.

We pride ourselves with our high level of customer service. Our customers are our business, and we give the highest priority to them.

Our Promise.

We promise you will be satisfied with the high quality products that we offer. If for some reason they do not meet your standards, we will make it right.

Solution Focused.

Our goal is to find the best solution for your specific security needs. With our wide access to available security products and premium services, we have solutions to all of your security needs.

Time is Money.

We understand that criminal activity can happen at any time, which is why we are focused on having extremely short lead times and making sure our in-stock inventory is sent out within two business days.