COVID-19: ZAGO Sealing Fasteners Available for Ventilator Manufacturing. Learn More.

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Sealing Screws and Bolts

Sealing Screws and Bolts

See optimum performance in your machinery, and rule out the possibility of failure with ZAGO’s high-tech self-sealing screws and bolts.

Switch Boots

Switch Boots

Fully protect your electronic devices with push button, toggle and rotary switches from hostile environments.

Crystal Switch Seals

Crystal Switch Seals

Crystal clear solutions for protecting your switches from contaminants, extreme temperatures and weather conditions.

Seal Nuts and Washers

Seal Nuts and Washers

ZAGO’s sealing nuts and washers are designed to withstand extreme pressure and to form a complete seal along the threading of your bolt.

Security/Tamper Proof Seal Screws

Security/Tamper Proof Seal Screws

These ultimate screws will provide you with outstanding security against any external/internal contamination from air, water, gas and other materials.

Special Sealing Screws

Special Sealing Screws

Custom solutions to meet your unique specifications and challenges.

High-Tech Custom Sealing Solutions Preferred by Thousands of Engineers & OEMs Worldwide

When it comes to protection, resilience and optimization of high-value equipment, ranging from power grids and solar panels to rechargeable batteries and minute sensors enabling smart technology, time and again, engineers and OEMs choose ZAGO high-tech, sustainable sealing solutions and components. There are many reasons why.

Thanks so much, I appreciate all your help... as usual! I deal with a lot of vendors, and you guys really stand out! Great customer service and I appreciate it!

Bonnie, Fort Worth, TX


Technically, we can help anyone

Sealing fasteners for military and defense

Military & Defense

The only military grade sealing screw manufacturer capable of NASM specified pressure testing.

Sealing fasteners for aerospace


Built to perform while withstanding the extreme heat of continuously operating engines powering air fleets, rockets, and spacecraft.

Sealing screws for electronics and enclosures

Electronics & Enclosures

NEMA-ready solutions for NEMA bound electrical enclosures.

Sealing screws for commercial lighting

Commercial Lighting

Designed to protect the most fragile sensors powering smart lighting.

Medical Devices

FDA approved O-rings, ideally suited for the most sensitive, high-value medical devices.

Robotics & Drones

Optimizing battery life, functionality of robots and drones operating in harsh environments.


Protecting high-value subsea assets from corrosion, seepage; paving way for undersea exploration.

Energy Generation & Recovery

Advancing innovation, protecting the earth with pressure-resistant, sustainable O-ring technology.


Prolonging the lifespan and efficiency of engines, motors, powertrains; reducing their carbon footprint. Providing PPAPs and First Article Inspection Reports to satisfy the most exacting automakers.

Engineering Solutions for Your Sealing Challenges

NASM 82496 Testing

Only ZAGO tests for NASM 82496.

Security and sealing solutions for NEMA enclosures.

NEMA Ready

Security and sealing solutions that optimize and meet the requirements of NEMA enclosures.

Secondary Process

Full range of plating, self-locking and painting.

Product Customization

Custom solutions to meet your exact specifications.

From Sustainability to Saving Lives; Engineers are Accelerating Innovation

News & Events


Product Guides

What are Sealing Fasteners?

Sealing fasteners are highly specialized fastenersthat include sealing screws, sealing nuts, sealing bolts and sealing washers. Unlike ... Read More


Videos & Podcasts

Tips for getting back to business: A follow-up interview with ZAGO

Early in the COVID-19 pandemic, we began speaking with businesses that were deemed essential to learn what safety strategies they ... Read More



Small Components Making Big Impact Featured on 60 Minutes

As the Coronavirus snowballed in early March, a grim reality set in: Tens of thousands of patients, health care providers and volunteers ... Read More


Industry Week

Industry Week selects ZAGO to represent NJ in its list of US manufacturers

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Newark Manufacturer ZAGO Shifts Focus to Aid Outbreak Efforts

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COVID 19: ZAGO High-Tech Sealing Fasteners Available to Meet Surge in Ventilator & ECMO Manufacturing

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