Made in Manhattan, MontanaLifetime Warranty90-Day Knuckle-Saver Guarantee1,000 HR Salt-TestedFree Shipping in the Lower 48Made in Manhattan, MontanaLifetime Warranty90-Day Knuckle-Saver Guarantee1,000 HR Salt-TestedFree Shipping in the Lower 48
Coupler

Coupler Lock

Lock the trailer. Trust the tow.

Original price was: $160.00.Current price is: $140.00.

  • Heat-treated 17-4 stainless body. Anodized aircraft-grade aluminum handle.
  • Built-in lock. Keys alike with the Titanium Hitch Pin.
  • Machined in Manhattan, Montana. Warrantied for life.

The quick-release coupling lock
PinUltimate- Coupling Lock. Same great quality as our PinUltimate hitch pin. Allows for seamless transition from locking your receiver hitch and trailer latch with one key. Has an option to operate in the unlock position for the times when your keys are not handy or when you want to secure the trailer latch without having to lock.  With minimal maintenance it will always operate smoothly.

PinUltimate- Coupling Lock  /  BSPA-1500

  • Heat-treated 17-4 stainless steel and aircraft-grade aluminum
  • Exclusive ConnecTrick™ Quick-Release System
  • Fully-Machined, Ergonomic handle
  • Anodized finish
  • Order keyed alike with the PinUltimate titanium hitch pin
  • Maintenance- Wash when washing vehicle, dry & lubricate lock

Ships in 3-4 weeks. Sold out for now. Order today and yours goes out with the next run.

Ordering more than one? Match the keys (optional)

Key ALL PinUltimate quick-release hitch pins/Coupling Locks to the same key, allowing for easy interchangeability.

Key number to match your current hitch product(s) if any.

Lifetime Warranty
Free Shipping (Lower 48)
Made in Montana
90-Day Guarantee
/ WHY THIS PIN

Built the right way.

DESIGN

Anti-theft Zero-Gap.

We didn't leave room for a thief to wedge in a tool. The lock seats flush against the coupler, no gap, no leverage point.

MATERIAL

17-4 stainless + alloy.

Heat-treated 17-4 stainless steel and 6061 aircraft-grade aluminum. Sealed against weather, ready after years in salt and road grime.

KEY

Bidirectional. One-key.

The bidirectional key works either way you insert it. Order keyed-alike to your PinUltimate Hitch Pin and one key operates both.

/ SPEC SHEET

The numbers.

PIN LENGTHS
Two included
FITS
Standard 9/32 in trailer latch holes
MATERIAL
17-4 Stainless · 6061 Aluminum
LOCK
Bidirectional · serialized
KEYED-ALIKE
Optional with Hitch Pin
TOW UNLOCKED
Yes — key removable in either position
ORIGIN
Manhattan, Montana
WARRANTY
Lifetime + 90-day Knuckle-Saver

/ Questions

Straight answers.

What does it do?

It locks your trailer coupler so the trailer stays where you left it. The lock is built in. Body is heat-treated 17-4 stainless steel, handle is red-anodized aircraft-grade aluminum.

Can it use the same key as my hitch pin?

Yes. The bundle pairs it with the Titanium Hitch Pin, keyed alike. One key for both.

Will it rust?

It is rust resistant. The body is heat-treated 17-4 stainless steel and the handle is red-anodized aircraft-grade aluminum, so the finish does not corrode.

Does it need maintenance?

No grease. Wash it when you wash the truck and dry it off. Every so often, give the lock cylinder a shot of WD-40. That is the whole list.

Why does it cost $140?

A heat-treated 17-4 stainless body, a red-anodized aircraft-grade aluminum handle, and a lock built into it, machined in Manhattan, Montana. It is covered for life, and if it does not earn its keep in 90 days, send it back for a full refund.

What is the warranty?

Lifetime. That covers material defects, failure of the push-button mechanism, and premature corrosion of the stainless parts. No charge, and we cover the return shipping. On top of that is the 90-day Knuckle-Saver guarantee: if you do not love it, send it back within 90 days for a full refund.

Read the warranty

Where is it made?

Manhattan, Montana. Every one is designed, machined and assembled by Big Sky Precision. Not some of it. All of it.

Built for life. Backed by life.

Lifetime Warranty · 90-day Knuckle-Saver Guarantee · Made in Montana