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)

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'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)

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)

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)

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)

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)

The O-ring element in a sealing fastener can be made from a variety of compounds, depending on the intended application. It's important to choose the material carefully - we can help. https://apmhexseal.com/blog/a-guide-to-o-ring-material-selection/ (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)

Download our eBook:
"Sealing Boots Selection Guide: How to Choose the Right Boot for Your Next Project

Learn more about Sealing Boots from APM Hexseal!

The APM Hexseal line of sealing boots ensures superior protection for switches against external contaminants and harsh environments.

Our eBook, "Sealing Boots Selection Guide: How to Choose the Righ... (read more)

At APM Hexseal, we pride ourselves on providing the highest-quality sealing solutions for the medical industry. Our sealing solutions are an ideal option for a variety of medical applications. Our products are made using a wide range of O-ring and molded rubber materials, designed to be used with a multitude of chemicals, in various environmental conditions.

Medical profess... (read more)

APM Hexseal’s Seeloc® Washers consist of molded silicone rubber bonded to specially formed stainless steel washers.

At APM Hexseal, we design and manufacture an expansive range of proprietary high-performance self-sealing hardware for use in environments ranging from standard to severe. Our product line includes bonded sealing washers, raised metal washers bonded... (read more)

WHAT IS A SELF-SEALING SCREW?

In many industrial and commercial operations, fasteners are exposed to extreme conditions (e.g., impact or vibration) that may compromise the integrity of the hardware or the assembly. Self-sealing screws—such as our Seelskrew® products—are engineered to serve as a solution to these problems, creating strong joints and seals tha... (read more)

At APM Hexseal, we specialize in the design and manufacture of sealing solutions. Equipped with over 70 years of industry experience, we have the knowledge and skills to develop high-performance sealing solutions for even the most extreme and volatile environments. One of our core product offerings is sealing hardware.

Sealing hardware has a dual purpose. It is designed to fasten... (read more)

APM Hexseal vs. Offshore Options

APM Hexseal has formed a continuous improvement initiative that spans our entire operation. Under our “Ever Better” corporate vision, we work hard to consistently provide products and services that meet or exceed the expectations of our customers and partners.

Our newest eBook, APM Hexseal vs. Offshore Options, highlights... (read more)

Fasteners such as screws, bolts, nuts, and nails provide connections for critical components and disparate substrates across industries. Sealing fasteners go a step further by tightly sealing against the substrate, making them particularly for high-value and high-intensity situations. Today, we want to take a closer look at sealing fasteners – what they are, how they work, and why... (read more)

NUTZILLA WINS FASTENER INNOVATION AWARD (read more)

Protecting Devices & Equipment from Contamination

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

Download the Seal Stuff In, Seal Stuff Out eBook (read more)

Download the eBook: You're Gonna Need a Bigger Boot (read more)

APM Hexseal is a leader in sealing technology for a wide variety of industries worldwide. Since 1947, we have committed ourselves to the development and innovation of top-of-the-line sealing solutions for everything from military and industrial equipment to medical and pharmaceutical devices.

Our products include sealing boots, self-sealing fasteners, toggle switch boots, and O-ri... (read more)

Our latest eBook talks about how you can consolidate all stages of your project’s development, from design to completion, all under one roof. (read more)

Our Latest eBook Reviews Sealing Hardware Grooves & APM Hexseal's Processes

All the benefits and applications of our sealing hardware's unique groove.

Download Your Copy

Our eBook, Get Into the Groove, covers all you need to know about our innovative groove technology.

Inside, you'll learn about:

• What is the Groove?<......

APM HEXSEAL® HOLDS THE NOTABLE DISTINCTION OF HAVING DESIGNED AND PATENTED THE VERY FIRST SELF-SEALING FASTENERS, WHICH LATER BECAME OUR TRADEMARKED SEELSKREWS® AND SEELBOLTS® (read more)

COVID-19: APM HEXSEAL’S SEALING SOLUTIONS FOR MISSION-CRITICAL APPLICATIONS (read more)

Remember, fireworks aren't the only things that light up the night! Light the way with our new line of glow in the dark switch boots. (read more)

Confused About Which Screw Drive Style to Choose? Don't Lose Your Head! (read more)

WE ARE PROUD TO INTRODUCE OUR NEW LINE OF EMERGENCY GLOW SWITCH BOOTS!

These boots will charge with exposure to any normal light source and will begin to glow the minute the lights go out. (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 (read more)