The Screwless Hinge: Inside LINDBERG's Rivet-Free Engineering

Pick up almost any pair of metal glasses and look closely at the corner where the arm meets the front. You will see a tiny screw. That screw is the single most common failure point in eyewear — it loosens, it strips, it falls out at the worst moment, and it is why so many people keep a miniature screwdriver in a drawer. LINDBERG's answer was radical: remove it entirely. The brand's signature titanium frames have no screws, no rivets, and no welds at the hinge. Here is how that works and why it matters.

The problem with the screw

A conventional hinge is a small mechanical assembly: two interlocking barrels held together by a threaded screw, sometimes reinforced with rivets or solder where the hinge attaches to the frame. It works, but it carries built-in weaknesses. The screw is under constant stress every time you fold and unfold the glasses — potentially thousands of cycles a year — so it gradually loosens. The threads can strip. The metal around it can corrode. And every one of those parts adds weight and visual bulk to a place where LINDBERG wanted neither.

LINDBERG's solution: a spring, not a screw

Instead of fastening the temple with a screw, LINDBERG's hinge uses a spring mechanism. The temple connects to the front and is held by spring tension, allowing it to open, close, and flex without a threaded fastener anywhere in the joint. There is nothing to unscrew because there is no screw.

This is the heart of the Air Titanium design language and it carries into the rimless Spirit line, whose Spirit hinge is the collection's signature detail. Because the joint is integrated and screwless, the line of the frame flows uninterrupted from front to temple — part of why LINDBERG frames look so clean from the side.

Why removing the screw makes the frame better

This is not engineering for its own sake. The screwless hinge delivers concrete, everyday benefits:

• Less weight. Fewer components — no screw, no rivets, no solder — means less material at the joint, contributing to LINDBERG's famously low frame weights.
• Nothing to loosen or lose. The most common eyewear annoyance simply cannot happen. There is no screw to back out over months of folding, and no tiny part to drop and search for on the floor.
• Fewer corrosion points. Screws and dissimilar metals are common places for corrosion to start. Removing them, in a frame already made of corrosion-resistant titanium, means one less thing to degrade.
• A cleaner look. With no fastener interrupting it, the hinge area is minimal and the frame reads as a single continuous piece.
• Built-in flex. The spring action lets the temples give slightly when you put the glasses on, which is gentler on the frame and more forgiving of a wider range of head shapes.

Does screwless mean it can't be serviced?

No — it is the opposite. Removing the screw does not remove serviceability; it removes the part most likely to need servicing. LINDBERG frames are modular and designed to be adjusted and maintained by a qualified optician, and temples and other components can generally be adjusted or replaced through proper service channels. The difference is that routine "my screw came loose" visits largely disappear. If your frame ever needs attention, bring it to the optician you bought it from rather than working on it yourself, especially on rimless styles where the lens is mounted directly to the frame.

An engineering signature, not a gimmick

Plenty of eyewear marketing leans on buzzwords. The screwless hinge is different because it is genuinely rare — very few manufacturers build a truly screwless, rivetless, weldless hinge, and LINDBERG has been refining the approach for decades since its Air Titanium collection helped define the modern minimalist frame. When you hold one, the absence is the point: there is nothing there that does not need to be, and that is exactly why it feels like nothing on your face.

See the screwless hinge in person

The detail is easiest to appreciate up close. Explore the Spirit Titanium rimless collection, home of the Spirit hinge, or the Air Rim titanium collection, and use the interactive configurators to preview frames, colors, and temples before you visit.

Frequently asked questions

Do LINDBERG glasses have screws?

No. LINDBERG's signature titanium frames use a screwless hinge with no screws, rivets, or welds. The temple is held by a spring mechanism instead of a threaded fastener, so there is nothing at the hinge to loosen, strip, or fall out.

How does a screwless hinge work?

Instead of joining the temple to the front with a screw, a screwless hinge uses spring tension to hold the temple in place while still letting it open, close, and flex. LINDBERG integrates this spring mechanism into the joint, so the frame flexes and folds normally without any fastener.

What is the LINDBERG Spirit hinge?

The Spirit hinge is the screwless spring hinge used in LINDBERG's rimless Spirit Titanium collection. It connects the temple without screws or rivets, contributing to the line's very low weight and clean, uninterrupted profile.

Are screwless hinges more durable?

They remove the most common eyewear failure point, since there is no screw to loosen or strip and no small fastener to lose. Combined with corrosion-resistant titanium and a flexing spring action, the design tends to be low-maintenance and long-lasting, though frames should still be serviced by an optician when needed.

Can a screwless hinge be repaired?

Yes. LINDBERG frames are modular and designed to be adjusted and serviced by a qualified optician, and components can generally be adjusted or replaced through proper service channels. Removing the screw removes the part most likely to need routine attention, but professional service is still available if required.