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O-Rings and Gaskets

Don't let O-Ring or Pressure Gasket Failures Keep You Down. HOLLOWAY Stocks the Parts to Get Things Back on Track Now.

A photo of HOLLOWAY AMERICA O-Rings along with the text "Ask About Our Stocking Program"

O-Rings & Pressure Gaskets. Always Stocked to Reduce Downtime.

Sometimes it’s the little things that make all the difference. Minor details can have major ramifications to your process without warning. O-Ring gasket failures contribute to countless hours of downtime and lost production dollars every year. HOLLOWAY AMERICA offers a full line of O-Ring and ferrule gaskets to keep your vessel up and running and meet its full potential.

Want our O-Rings delivered to your production floor with full documentation in a matter of days, even next day air? Our stocking program makes it possible. Reach out to us for more information.

Material Types

We keep .275" and .313" diameter EPDM Class VI O-Ring material in stock for quick processing and delivery. Many other material types are available, including:

  • Platinum Cured White Silicone Class VI
  • Black Viton Class VI
  • Red Silicone Class VI
  • Teflon Encapsulated Units, and more.

Our custom materials come with varying lead times depending on the material type.

HOLLOWAY also has a wide assortment of tri-clamp ferrule gaskets in stock for fast delivery. All of our gaskets and O-Rings ship with accurate and detailed certificates of conformance to eliminate documentation delays.

Have a Precision Stainless Vessel?

HOLLOWAY AMERICA can reference the original O-Ring sizes and dimensions to provide you with quality replacement gaskets to keep your equipment running smoothly for years to come.

Struggling with another manufacturer's vessel and the quality or service you're getting from them?

HOLLOWAY AMERICA can help you determine the original O-Ring dimensions and can provide you with quality replacements for those vessels as well.

Plan ahead and avoid costly downtime with elastomers provided by HOLLOWAY AMERICA.

A photo of HOLLOWAY AMERICA's O-Rings

Ask about our O-Ring Gasket stocking program.

Ask how you can get our O-Ring Gaskets shipped from our facility to your production floor in as little as next day air (compared to several weeks' turnaround from other providers.) Every shipment includes all required documentation.

  • Available for Black Viton Class VI, Red Silicone Class VI, EPDM Class VI, and Platinum Cured White Silicone Class VI
  • Available for H-Series Manways ranging in size from 12" to 24"

Get in touch with us or call at (417) 863 0077 to get started.

Materials Specifications

Black Viton Class VI

H-Series Manway Size O-Ring Size Part Number
12" 12-15/16" I.D. x .313" C/S CGAS71212-6
14" 14-15/16" I.D. x .313" C/S CGAS71214-6
16" 16-15/16" I.D. x .313" C/S CGAS71216-6
18" 18-15/16" I.D. x .313" C/S CGAS71218-6
20" 20-15/16" I.D. x .313" C/S CGAS71220-6
22" 22-15/16" I.D. x .313" C/S C CGAS71222-6
24" 24-15/16" I.D. x .313" C/S CGAS71224-6

Red Silicone Class VI

H-Series Manway Size O-Ring Size Part Number
12" 12-15/16" I.D. x .313" C/S CGAS71112-6
14" 14-15/16" I.D. x .313" C/S CGAS71114-6
16" 16-15/16" I.D. x .313" C/S CGAS71116-6
18" 18-15/16" I.D. x .313" C/S CGAS71118-6
20" 20-15/16" I.D. x .313" C/S CGAS71120-6
22" 22-15/16" I.D. x .313" C/S C CGAS71122-6
24" 24-15/16" I.D. x .313" C/S CGAS71124-6

EPDM Class VI

H-Series Manway Size O-Ring Size Part Number
12" 12-15/16" I.D. x .313" C/S CGAS71312-6
14" 14-15/16" I.D. x .313" C/S CGAS71314-6
16" 16-15/16" I.D. x .313" C/S CGAS71316-6
18" 18-15/16" I.D. x .313" C/S CGAS71318-6
20" 20-15/16" I.D. x .313" C/S CGAS71320-6
22" 22-15/16" I.D. x .313" C/S C CGAS71322-6
24" 24-15/16" I.D. x .313" C/S CGAS71324-6

Platinum Cured White Silicone Class VI

H-Series Manway Size O-Ring Size Part Number
12" 12-15/16" I.D. x .313" C/S CGAS71912-6
14" 14-15/16" I.D. x .313" C/S CGAS71914-6
16" 16-15/16" I.D. x .313" C/S CGAS71916-6
18" 18-15/16" I.D. x .313" C/S CGAS71918-6
20" 20-15/16" I.D. x .313" C/S CGAS71920-6
22" 22-15/16" I.D. x .313" C/S C CGAS71922-6
24" 24-15/16" I.D. x .313" C/S CGAS71924-6

Benefits of HOLLOWAY AMERICA's O-Rings and Gaskets

Complimentary O-Ring Storage

HOLLOWAY AMERICA will store pre-made O-Rings or materials on your behalf.

Custom Sizes and Materials

HOLLOWAY AMERICA can create O-Ring Gaskets from most materials and, in most cases, can custom-fit them to your machinery.

Fast Shipping

Have O-Rings shipped your way in just one to two business days when you become part of HOLLOWAY AMERICA’s O-Ring Stocking Program.

"Really, if you compare to other manufacturers, HOLLOWAY is really much better, tidier and all around super smooth. The last bit is so important in our industry of medical device manufacturing. And, best of all, working with HOLLOWAY is NOT like a box of chocolates (you never know what you are going to get)... like our previous supplier."

— Rebecca A., OEM Medical Device Supplier Company Owner

"I was floored with HOLLOWAY's outgoing hospitality and kindness. HOLLOWAY certainly impressed me with history and having up-to-date tech. Having been to so many competitors, I see the difference now with such devoted people."

— James B., Process Engineer and Pharmaceutical End User

"I wanted to acknowledge the outstanding work HOLLOWAY folks perform with special recognition to their technicians, who are outstanding. They are key for the huge success in the timely turnover of our tank to operations."

— Binaya S., Process Engineer and Pharmaceutical End User

We're ready to craft your solutions.

Tell us more about the products and services you're interested in—as well as which industry you call home—on our quick-and-easy "Request for Information" form. Or, give us a call and talk to one of our representatives.