Nilight 2-5/16-Inch Trailer Lock, Model 146A

Model: The Nilight 2-5/16-inch Trailer Lock is a keyed coupler-lock set listed for specific 2-5/16-inch A-frame and adjustable couplers. Its fit is the deciding factor: the listing cautions that not every coupler of this nominal size is compatible.

At a glance

Designed for certain 2-5/16-inch A-frame and adjustable trailer couplers, not stated as universal for every coupler of that size.
The listed set includes a cylindrical lock body, a one-touch puck lock, a ball-hitch inner slide and two keys.
The listing describes a press-fit disc lock and claims an anti-drill core and corrosion-resistant coating.

Price

$79.44Save 39%

Reference price: ~~$129.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

The set includes two keys and multiple listed lock components rather than a single lock body.
The listing describes quick installation and removal, which may suit owners who regularly secure and release a trailer.

Technical specifications

9 specifications

Identity
Brand	Nilight
Model	Nilight 2-5/16" Trailer Lock
Lock type	Pin Tumbler
Special feature	Anti-theft
Number of pieces	5

Dimensions and installation
Weight listed	6.69 kg

Materials and protection
Material listed	Alloy Steel
Color	Black
Finish	Painted

What to know before buying

Coupler fit is limited to specific 2-5/16-inch A-frame and adjustable designs. Confirm the shape and dimensions of your coupler before purchase. The listing's claims about resistance to impacts, tools, drilling, rust and weather are manufacturer claims, not independently established performance.

What’s in the box

Included

Cylindrical lock body
One-touch puck lock
Trailer ball-hitch inner slide
2 keys

Who is it for?

A good fit for

Trailer, camper, boat or RV owners whose coupler is a confirmed compatible 2-5/16-inch A-frame or adjustable type.
Buyers looking for a keyed coupler-lock set with two keys and several listed lock components.

Less suited to

Owners who have not confirmed their coupler design and dimensions.
Buyers seeking a lock explicitly confirmed to fit couplers other than the specified 2-5/16-inch types.

Nilight 2-5/16-Inch Trailer Lock, Model 146A · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 12 ratings

5 stars75%75%
4 stars13%13%
3 stars0%0%
2 stars0%0%
1 star12%12%

Aggregate ratings lean positive, with most ratings in the five-star category, but a smaller one-star share signals that experiences are not uniformly favorable. The sample is limited and contains no supplied written customer feedback, so it does not establish what buyers liked or why others rated it poorly. For this lock, verifying coupler compatibility is more actionable than drawing conclusions about fit or security from the ratings alone.

Frequently asked questions

Will this fit any 2-5/16-inch coupler?

Not necessarily. The listing says it is designed for specific 2-5/16-inch A-frame and adjustable couplers, so confirm that your coupler's design and dimensions match.

What components are listed in the set?

The stated contents are one cylindrical lock body, one one-touch puck lock, one ball-hitch inner slide and two keys.

Are the security and weather-resistance claims verified?

The listing claims resistance to impacts, tools, drilling, rust and weather, but the supplied information does not independently verify those performance claims.