At APM Hexseal, we’re going nuts! As we’ve worked to expand our line of self-sealing nuts, we realized that size really does matter and sometimes bigger IS better. To that end, we’re proud to announce our new “Nutzilla” product. As the largest Seelnut® in our portfolio, these puppies are the size of…well, puppies!


Nutzilla Design

No matter what size nut you need, Seelnuts from APM Hexseal can be relied upon to operate at the same high standards. We offer the Nutzilla in sizes up to M90 with the same superior-quality our customers have come to expect from the rest of our molded product line. Our Seelnuts are made from high quality rubber, molded into a specially shaped cavity in the nut itself.  With the threads molded directly into the rubber, these self-sealing nuts form a positive seal along the threaded section of the nut, as well as with the contact surface. 

Like our other Seelnuts and sealing hardware, we use our proprietary metal-to-rubber bonding process to create Nutzilla. The single-piece design guarantees a nut that provides a consistent, reliable seal for ordinary large bolts without the need for additional gaskets or messy sealing compounds.

Some of the benefits offered by Nutzilla include:

  • Reusability
  • A shelf life exceeding 25 years
  • High seal integrity

Applications of Nutzilla

There are countless use cases for giant bolts, which means there are countless use cases for Nutzilla! When working with oversized fasteners, simpler is better. The one-piece nature of Nutzilla makes installing large bolts a breeze. The self-sealing nature of Nutzilla not only reduces time and effort spent on installing bolts and nuts, but also mitigates the need to spend extra money on separate gaskets or large volumes of sealing solution.

Our gargantuan Nutzilla makes an ideal solution for sealing bolts in applications such as:

  • Bridge and tunnel building
  • Excavation equipment
  • Industrial construction
  • Oil and gas production
  • Power generation
  • Subterraneous and subaquatic infrastructure
  • Transportation

These applications have no room for early bolt failure due to corrosion or wear. Nutzilla keeps bolts firmly sealed so that moisture, dust, and other environmental factors won’t have a negative impact on the efficacy of the hardware. Our reliable sealing hardware also helps to keep the bolt properly seated through shifting, vibration, and other disruptive factors found in harsh operating environments.

About APM Hexseal

APM Hexseal has been creating sealing boots, self-sealing fasteners, and other sealing hardware for more than 70 years. We specialize in developing and manufacturing sealing hardware that offers superior performance in even the harshest environments.

Cover it. Seal it. Protect it.  Ask the Experts at APM Hexseal.

Ever Better.