S‑5 Coupler Locks

S‑5 Coupler Locks are precision‑machined steel locks that secure the coupler mechanism itself, not just the ball area. This makes them far harder to defeat than standard “U‑shaped” trailer locks.

They are known for:

  • Thick, tamper‑resistant steel housings

  • Puck‑style locks (no exposed shackle to cut)

  • Custom‑fit designs for specific coupler types

  • Made in the USA construction

  • High security for work, farm, and commercial trailers


Benefits

  • Stops thieves from opening the coupler

  • Protects both parked and stored trailers

  • Fits the most common 2" and 2‑5/16" couplers

  • Weather‑resistant and long‑lasting

  • Ideal for equipment, livestock, cargo, and gooseneck trailers
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