Sealing Solutions for Drones & UAVs: Protecting the Unmanned Mission

Drones and other unmanned aerial vehicles (UAVs) are our eyes in the sky, performing critical functions in areas that are often too remote or too dangerous for human access. Their reliability is non-negotiable. With sophisticated mechanical and electrical systems, the failure of just one unsealed component ca... (read more)

Field-Tested Electronic Sealing

APM Hexseal delivers a comprehensive line of high‑performance sealing solutions purpose-built for today’s most demanding electronic systems—from self-sealing fasteners and rocker boots to circuit breaker boots and beyond. Every component is engineered to safeguard mission‑critical electronics from moisture, dust, chemicals, a... (read more)

It’s more than just covering a component. High-performance sealing boots are engineered with features that support both protection and usability:
- Transparent materials for clear switch and indicator visibility
- Molded triggers that preserve tactile response
- Hermetic sealing ribs to block moisture, dust, and contaminants
- Proprietary silicone compounds buil... (read more)

Our trademarked Seelnuts install just like ordinary nuts and are designed to be used with conventional screws and bolts. They are a single piece design, featuring threads molded directly into the rubber in a custom grooved cavity. This creates a consisten and reliable seal, suitable for many applications. (read more)

APM Hexseal's patented Seeloc Washers work in combination with standard screws or bolts. They feature a continuous contact ridge that creates a tight seal around the periphery and fastener head. (read more)

APM Hexseal is a leading provider of durable high-quality sealing hardware, including custom-molded gaskets and washers. Gaskets and washers are often assumed to be the same thing, as they have a similar design and are both used in conjunction with other components. While they have a similar appearance, they serve very different purposes.

GASKET VS. WASHER: WHAT’S THE DIFFER... (read more)

Our Seeloc™ Washers work in combination with traditional bolts, screws or studs, to produce an airtight seal around the fastener. The silicone contact surface features a continuous ridge that creates a 360° sealing barrier around the periphery of the washer, when compressed. This generates a complete, high pressure, seal. Learn More (read more)

Our Seeloc® Washers consist of molded rubber, bonded to custom formed stainless-steel washers. The contact surface creates a 360° sealing barrier around the periphery of the washer face when compressed. (read more)

APM Hexseal has manufactured sealing products in our New Jersey facility since 1947. After over 75 years, our products are still proudly manufactured in America.

What Does Manufactured in America Mean?

Over the last few years, there has been a movement to reshore manufacturing. This brings jobs back to the United States and is more cost-effective in the long run. Companies... (read more)

We want to ensure you have the latest insights into our advanced sealing solutions and newest product innovations.

Explore our newly updated Product page to discover our complete range of sealing solutions and hardware—now featuring the latest innovation, our Sealing Socket Head Cap Screws.

Our redesigned Industries page offers an in-depth look at our experience acro... (read more)

We’ve got just the guide for that!

When it comes to protecting electrical systems in marine and harsh environments, sealing boots are your first line of defense against water, chemicals, salt, and debris.
In our latest eBook, we dive into:

• Boot types & use cases
• Environmental protection strategies
• Real-world application insights...

Sealing Washers vs. Non-Sealing Washers: What’s the Difference?

Washers may seem like simple hardware, but they serve a critical function in keeping fasteners secure. While all washers help distribute force and protect surfaces, some go a step further by providing a reliable seal against dust, moisture, and other contaminants.

So, what’s the difference? Sealing... (read more)

At APM Hexseal, we design and manufacture high-performance sealing solutions on-site in New Jersey, ensuring quality for over 75 years. This Manufactured in America approach allows us to carefully control our processes from start to finish, so we deliver quality product solutions and customer service. (read more)

Seeloc^® Washers work with traditional bolts and screws to create an airtight seal around the fastener. The silicone contact surface features a continuous ridge that creates a 360° sealing barrier (read more)

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Seeloc^® Washers work in combination with traditional bolts, screws, or studs to create an airtight seal around the fastener. The silicone contact surface features a continuous ridge that creates a 360° sealing barrier around the periphery of the washer face when compressed (read more)

Protecting Devices & Equipment from Contamination

Medical professionals rely heavily on functionality and accuracy of critical medical instruments and devices (read more)

The Importance of Thread Pitch and How to Select the Right Fastener for Secure and Reliable Connections

Thread pitch is one of the fundamental characteristics of screw design. Pitch directly affects the holding power and integrity of threaded assemblies. It is the key to pairing a screw or bolt with a compatible nut and ensuring smooth installation.

Whether you&rsquo... (read more)

Silicone rubber provides a number of advantages over other elastomeric materials. This sealing solution offers a robust combination of tensile strength, vibration and noise dampening, and thermal stability. Silicone rubber is also resistant to various chemicals, abrasions, and weathering.

APM Hexseal has been developing advanced bonding and sealing solutions for a range of materia... (read more)

APM Hexseal's innovative sealing products offer excellent performance in some of the most hostile environments. They are highly effective at protecting sensitive internal and external elements to ensure the functionality, reliability, and safety of various electrical and electronic devices and systems.

Learn More (read more)

Sealing Socket Head Cap Screws eBook

Learn more about Sealing Socket Head Cap ScrewsSealing socket head cap screws feature a recessed hexagonal drive and a barrel-shaped head. The head has smaller dimensions than most standard screws, making it suitable for use in confined areas. These screws are extremely versatile. Their sleek, attractive appearance is ideal for applicati... (read more)

Electronic sealing solutions are vital to a wide variety of large-scale digital entertainment applications. Digital media events of all types run the risk of exposure to numerous weather conditions. Therefore, electronic systems used at these events can benefit from APM Hexseal’s high-quality sealing solutions to protect critical controls from exposure to dirt, dust, salt, wind, an... (read more)

Elastomers are the key to providing effective sealing solutions for applications in outdoor, marine, medical and any environment where sealing stuff in or sealing stuff out is imperative. Elastomers are versatile materials typically composed of polymers, and manufacturers prize them for their ability to bend and stretch in a variety of ways before returning to their original shape.

H (read more)

APM Hexseal’s sealing socket head cap screws are the big thing that fits in small places! These screws feature a barrel-shaped head with a recessed hexagonal drive. The head is dimensionally smaller than most other standard screws, making it well-suited for confined areas of installation. (read more)

Elastomers are the key to providing effective sealing solutions for applications in outdoor, marine, medical and any environment where sealing stuff in or sealing stuff out is imperative. Elastomers are versatile materials typically composed of polymers, and manufacturers prize them for their ability to bend and stretch in a variety of ways before returning to their original shape.

H (read more)

MILITARY SOLUTIONS BY APM HEXSEAL: ADVANCED SEALING TECHNOLOGY SINCE 1947

APM Hexseal was established in 1947 in response to some of the most fundamental technical challenges that faced military engineers during WWII. Since then, our electronic and electrical device seals have protected aerospace and military control panels and the devices that depend on them from environmental co... (read more)

At APM Hexseal, quality is our number one priority. Our sealing socket head cap screws are the big thing that fits in small places!

These screws feature a barrel-shaped head with a recessed hexagonal drive. The head is dimensionally smaller than most other standard screws, making it well-suited for confined areas of installation. In addition to its streamlined design and high-perf... (read more)

At APM Hexseal, we are a premier designer and manufacturer of high-performance sealing solutions for industrial and commercial applications. Look to the experts at APM Hexseal for high-quality sealing products suitable for use in highly demanding industrial and commercial operations. (read more)

At APM Hexseal, quality is our number one priority. Our sealing socket head cap screws are the big thing that fits in small places!

APPLICATIONS

APM Hexseal’s sealing socket head cap screws are used in various applications requiring a secure and leakproof connection. Common applications include:

• Automotive
• Industrial Machinery
• Exc...

THE PURPOSE OF WASHERS & WHY THEY’RE USED WITH FASTENERS

A washer is a mechanical component that consists of a circular flattened metal, plastic, or rubber disk with a hole through the middle. Washers are typically used with fasteners such as screws and bolts to distribute the load of the fastener, prevent damage to sensitive surface materials, and reduce the potential f... (read more)

Seeloc^® Washers work in combination with traditional bolts, screws, or studs to create an airtight seal around the fastener. The silicone contact surface features a continuous ridge that creates a 360° sealing barrier around the periphery of the washer face when compressed. The silicone rubber also forms a seal under the head of the associated fastener and makes full v... (read more)

APM Hexseal's self sealing socket head cap screws are the big thing that fits into small spaces! These screws feature a barrel-shapped head with a recessed hexagonal drive. The head is dimensionally smaller than most other standard screws, making it well suited for confined areas of installation. https://apmhexseal.com/products/sealing-hardware/sealing-socket-head-ca... (read more)

Sealing hardware is essential to ensure components are securely fastened within a system, and in preventing contaminants - such as liquid, dirt or gases - from damaging internal electronic or mechanical products. (read more)

APM Hexseal's sealing socket head cap screws feature a barrel-shaped head with a recessed hexagonal drive. The head is dimensionally smaller than most other standard screws, making it well-suited for confined areas of installation.

Visit our Sealing Sockets page to learn about:

• High-Performance Sealing
• Applications
• Advantages

(read more)

One of our earliest innovations is our Seelnut®. These self-sealing nuts provide a reliable seal, are reusable, install just like conventional nuts and are compatible with standard screws and bolts. (read more)

In the aerospace and defense industries, sensitive electronics play a vital role in nearly every mission. As these components are critical to the success or failure of each operation, protecting them from damage that may potentially affect performance is essential. At APM Hexseal, we provide a variety of sealing solutions suitable for use in the defense and aerospace industries. (read more)

In addition to fastening, our self-sealing screws and bolts offer a reliable and reusable seal, preventing (or containing!) contamination from dust, air, water, lubricants and other liquid or gaseous substances.

FIND OUT MORE ABOUT THE BENEFITS OUR PRODUCTS OFFER.

ASK THE EXPERTS

At APM Hexseal, we understand the need for reliable fasteners that can handle extreme co... (read more)

Sealing components are one of the most important elements of commercial lighting systems in both indoor and outdoor environments. Choose APM Hexseal to protect your commercial lighting systems and gain access to a variety of sealing fasteners and hardware that is properly designed, constructed, and tested.

Click here to learn more (read more)

Discover how our "Ever Better" vision sets us apart (read more)

A sealing fastener features an elastomer molded or built into the hardware, eliminating the need for messy pastes or sealants. Sealing fasteners create a much tighter seal than a standard fastener.

Learn More (read more)

O-Rings from APM Hexseal

O-rings play a vital role in sealing fasteners. Sealing fasteners are hardware devices (e.g., sealing bolts, sealing screws, and sealing nuts) used to mechanically join two or more components together. They also form seals at the fastening point that prevent unwanted ingress or egress of materials.

Visit our O-Rings page to learn about:

APM Hexseal’s Seelnuts are also reusable, meaning that they can be easily removed and reapplied, reestablishing the same reliable seal when torqued.

Our Seelnuts are available in all standard thread sizes as well as a variety of different elastomers to suit your application needs. Seelnuts can also be supplied with self-locking pellets for applications where excessive vibrat... (read more)

Founded in 1947, APM Hexseal is a leader in developing and manufacturing environmental sealing solutions for the advanced protection and longevity of circuit breakers and electromechanical switches.

APM Hexseal is a trusted sealing products provider for extreme military, commercial, and industrial applications. With worldwide sales representation, a national and international dist... (read more)

Fasteners such as screws, bolts and nuts provide connections for critical components and disparate substrates across industries. Sealing fasteners go a step further by tightly sealing against the substrate https://apmhexseal.com/blog/guide-to-sealing-fasteners/ (read more)

An elastomer is a material that returns to its original shape after bending and stretching, which makes it especially useful for sealing seams to prevent gases, liquids, and more from getting in or out. There are more than 20 types of elastomers, each with specific properties for effective sealing in a range of applications, including marine, outdoor, medical, aerospace, lighting, agricu... (read more)

HOW TO SELECT THE RIGHT ELASTOMER FOR YOUR SEALING BOOTS AND FASTENERS

Elastomers are the key to providing effective sealing solutions for applications in outdoor, marine, medical and any environment where sealing stuff in or sealing stuff out is imperative. Elastomers are versatile materials typically composed of polymers, and manufacturers prize them for their ability to bend an... (read more)

At APM Hexseal, we know the importance of producing military-grade parts that work well under extreme conditions. Since World War II, we’ve been providing crucial sealing solutions for use in military applications, protecting sensitive electrical components from water, dust, dirt, inclement weather and a plethora of other environmental hazards. Our sealing solutions are robust, lon... (read more)

Seeloc® Washers work with traditional screws or bolts to create an airtight seal around the fastener. The silicone contact surface creates a 360° sealing barrier around the washer face when it's compressed. The silicone also forms a seal under the head of the fastener, making for a complete, high pressure seal.

Learn More (read more)