Prime-Line K 5061 Chrome Mortise Double Lock Cylinder

Prime-Line K 5061 is a chrome-finish mortise double lock cylinder listed for Kwikset systems and storm or security doors. Its five-pin tumbler and brass construction suit replacement needs where the existing mortise lock and keyway match.

At a glance

Double-cylinder design for key-operated locking from the listed product description.
Five-pin tumbler with a Kwikset keyway.
Manufacturer describes solid brass construction with brass pins and keys.
Listed for mortise lock systems, including security screen door applications.

Price

$23.99Save 15%

Reference price: ~~$28.15~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Brass construction and a polished chrome finish are specified.
Two keys are listed as included.
The manufacturer says installation requires only a few simple tools.

Technical specifications

11 specifications

Identity
Brand	PRIME-LINE
Model	Chrome, Storm or Security Door Mortise Double Lock Cylinder, Kwikset

Lock features
Lock type	Key Lock
Control method listed	Hand Control
Keyway	Kwikset
Pin tumbler	5 pin tumbler

Dimensions and installation
Form factor	Round
Dimensions listed	2.28 x 0.69 x 1.25 inches
Designed for	doors equipped with mortise lock systems

Materials and finish
Material listed	Brass
Finish	Chrome

What to know before buying

Listing details to confirm

Confirm the existing mortise cylinder dimensions, door thickness and Kwikset keyway before ordering. The listed dimensions are 2.28 x 0.69 x 1.25 inches, while the description separately calls its length 2-9/32 inch. The title says double lock cylinder, but a feature also lists a thumb-turn, so the operating configuration is inconsistent. The description says double cylinder and directs buyers seeking a single cylinder with thumb turn to another part.

What’s in the box

Included

Lock
2 keys

Who is it for?

A good fit for

Replacing a compatible mortise cylinder in a storm or security screen door.
Buyers whose existing lock uses a Kwikset keyway and matches the cylinder dimensions.

Less suited to

Doors without a mortise lock system or buyers who have not confirmed fit and keyway compatibility.

Prime-Line K 5061 Chrome Mortise Double Lock Cylinder · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 86 ratings

5 stars62%62%
4 stars16%16%
3 stars8%8%
2 stars0%0%
1 star14%14%

Customer feedback describes installation as easy, but reports are mixed on function and fit, and some customers raise quality-control concerns. That variability matters for a replacement cylinder because matching the stated mortise setup and dimensions is essential. Ratings lean positive overall, but the lower-star share means the aggregate alone does not settle compatibility or consistency.

Positive themes

Customers describe installation as easy.

Negative themes

Some customers report quality-control concerns.

Mixed feedback

Feedback on functionality and fit is mixed, with both successful fits and reported issues.

Frequently asked questions

Will the Prime-Line K 5061 fit any storm door?

No universal fit is established. It is described for mortise lock systems and a Kwikset keyway, so check the existing cylinder dimensions and lock configuration.

How many keys are included?

The listed included components are the lock and 2 keys.

Is this a double cylinder or a thumb-turn lock?

The product description calls it a double cylinder, while a feature also mentions a thumb-turn. Because these descriptions conflict, confirm the configuration before buying.