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In August 2017 and in an effort to better leverage synergies between the entire Hercules Fluid Power Group OEM Business sector we joined forces with the rest of the seal companies focused on servicing OEM customers to form the Hercules OEM Group. We will continue operating in each respective location only now as one company to better serve you!
The OEM sector was comprised of J Royal in North Carolina, RT Dygert in Minnesota and Chicago, High Performance Seals in Washington, All Seals in California and Texas, and Problem Solving Products or “PSP” in Colorado.

What does that mean for you?

  • We are excited to be merging our existing reputation of superior precision, quality, and expertise with excellent service and on-time delivery.
  • We are in the process of working to integrate a new operating system and phone system so that all five companies are on the same system for ease of communication between locations.
  • We have locations throughout the United States. Once we are all on the same operating system and phone system we can get parts to your door much faster.
  • Our supply chain grew so we now have access to even more suppliers to continue providing the best price in the marketplace along with the best quality products.

All employees will continue in their roles at their respective office location. Our corporate office is located in Winston-Salem, NC and the management team are as follows:

  • Jon Casten- President of Hercules OEM Group
  • Scott Rassett - Vice President of Sales and Customer Service, Hercules OEM Group
  • Ginny Leblanc - Director of Supply Chain, Hercules OEM Group
  • Brian Seil - Director of Engineering, Hercules OEM Group
  • Adam Stowers - Director of Quality and Technical Services, Hercules OEM Group
  • Jacob Kistner - Controller/Business Development Manager, Hercules OEM Group
We could not be more excited about joining forces with the other OEM companies and we know that the Hercules OEM Group will be the most recognized name in the sealing industry. With the knowledge, experience, and resources that each company brings, the Hercules OEM Group will be a true force nationwide.

Mission Statement

Mission: To collaboratively and progressively engineer and distribute a variety of seals, across multiple product lines, no matter how complex or challenging your needs may be
Vision: To be our customers logical choice when selecting their sealing supplier
Values: Every action we take is driven by our key values of leadership, integrity, and respect

View Certifications

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Since 1958, RT Dygert has been a world leader in the supply of O-Rings and related products, hydraulic seals, custom machined plastics and custom molded rubber products. We have established our strong reputation by supplying our customers with quality products, timely delivery, great customer service and professional engineering assistance. RT Dygert is dedicated to supplying a consistently high-quality product. Our Quality Management System (QMS) has be found to be compliant to ISO9001:2008 standard by SAI Global, and we have a comprehensive quality laboratory, as well as a Certified Quality Engineer on staff. We understand and can comply with just about any quality requirement you might need. We are fully versed on PPAP requirements, as well as the many compliance programs required in today’s manufacturing environment. At RT Dygert, quality is always our first priority. Now that we are settled into our new warehouse in suburban Minneapolis, we have ample space for a substantial inventory of O-Rings and seals. If you need it, we have it in stock.



Located in Westminster, Colorado, PSP is dedicated to quality control by providing cost effective sealing and plastic solutions and outstanding customer service. Every employee is empowered to improve quality standards through training and team development. Exceeding customer expectations is second only to exceeding our own. We carry o-rings, seals, custom molded rubber parts, wipers, diaphragm, valves and u-cups in all types of materials including Kalrez®, Viton™, Simriz®, Nitrile (Buna-N), neoprene, rubber, silicone, polyurethane, TFE and FEP encapsulated elastomers.



J Royal opened its doors in 1952 and has consistently grown since then to become a well-respected, recognizable name in the sealing industry. Our customer base has also expanded to include virtually all sealing applications and market categories. We partner with many customers, creating custom solutions and parts geared to their unique needs. We develop designs, designate materials, recommend specifications and develop and test prototypes, carrying the process all the way through final certification. We are an ISO9001 certified company with a comprehensive laboratory and certified quality engineer on staff. Because we work with extensive and diverse markets, we’re experienced in a multitude of the compliance programs that today’s manufacturers require.



Headquartered in Auburn, Washington, High Performance Seals has a long history of providing manufacturers with quality fluid seals and molded or machined elastomeric and thermoplastic parts. We specialize in providing the products and engineering expertise for OEM applications where standard items and/or industry practices will not meet the customer’s specialized needs. We have built a strong reputation for supplying quality products, timely delivery, superb customer service and expert engineering assistance. High Performance Seals is ISO 9001 Certified, with an extensive laboratory and a Certified Quality Engineer on staff. We can comply with virtually every quality requirement you need. We are also capable of PPAP requirements and the many compliance programs required by today's manufacturers. High Performance Seals has one of the largest warehouses of products plus we offer numerous value-added services like JIT/Kanban programs, special marking and packaging options, pre-production and kitting, and much more.



Since 1974, All Seals has served the sealing needs of thousands of OEM and aftermarket users. From parts implanted in the human body, to parts on the space shuttle, we have designed, manufactured and distributed a wide variety of rubber and plastic items. Please let us assist with your current production or design requirements. O-rings, seals, gaskets, custom rubber parts, Custom Engineered O-rings, Minnesota quad rings, gaskets, seals, hydraulic seals, lip seals, U-Cups, Teflon oil seals, packings, adhesives, lubricants, epoxies, custom molded or extruded rubber products for OEM design and production. We stock a full-line of standard, metric and custom sizes and materials. All Seals has been one of the world’s leaders in seals, sourcing and distribution for over five decades. The only thing comparable to the quality of our parts is the depth of our service, from just-in-time delivery to our extensive engineering capabilities. When you have questions, we’ve got answers, even if it’s a custom priority solution. Our products fit virtually every category.


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