For a better seal in low-pressure applications, such as hydraulic return lines and oil drain plugs, these O-rings are softer than standard Buna-N O-rings.

Also known as boss O-rings, these O-rings are sized to fit straight threaded fittings to prevent leaks. With a 90A durometer hardness, they’re more wear resistant than standard Buna-N O-rings.

High-contrast colors make it easy to spot when these O-rings aren't seated properly and identify sizes at a glance.

Choose these O-rings for their adherence to strict military standards for material and construction.

These Buna-N O-rings are made and bagged in an ISO Class 7 (Fed. Std. 10,000) clean room.

Made of silver-plated 321 stainless steel, these O-rings can handle extreme pressure up to 11,000 psi. They resist grease, hydraulic oils, mineral oil, motor oil, and synthetic lubricants.

These O-rings are harder and stronger than standard polyurethane O-rings to handle high-pressure applications.

A step up from Buna-N, these HNBR O-rings contain extra hydrogen to better resist chemicals, weather, and abrasion.

Made of Viton® fluoroelastomer, these O-rings won’t degrade when exposed to chemicals such as sulfuric acid, butyl alcohol, and ethylene glycol. They’re also FDA compliant for direct contact with food.

Also known as Boss O-rings, these Viton® fluoroelastomer O-rings are made for tube fittings with a straight-thread connection. With a 90A durometer, they’re harder and more durable than standard Viton® fluoroelastomer O-rings.

Tested to meet ASTM E595, a standard used by NASA, these O-rings give off almost no volatile emissions that could damage sensitive electronics, even in a vacuum. They’re softer than standard Viton®, so they better conform to irregular surfaces.

Tested to meet ASTM E595, a standard used by NASA, these O-rings give off almost no volatile emissions that could damage sensitive electronics, even in a vacuum.

Use these O-rings with metric sanitary fittings, which are sometimes called aseptic fittings. Made of Viton® fluoroelastomer, these O-rings resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol.

Made for demanding applications, these O-rings hold up to constant motion, repeated compression, and extreme temperatures. They’re often used for centrifugal pumps and high-pressure hydraulic valves in chemical processing systems.

These are the highest purity chemical-resistant O-rings we offer. They are made and bagged in an ISO Class 7 and Fed. Spec. Class 10,000 clean room, plus they’re USP VI certified; not for use in medical applications.

Also known as Boss O-rings, these O-rings are made for tube fittings with a straight-thread connection. They’re made of Viton® fluoroelastomer that meets MIL-R-83248 performance standards.

Made of our hardest Viton® fluoroelastomer, these O-rings can handle sudden pressure changes that would cause softer O-rings to crack or deform.

Seal lines and valves in HVAC systems, freezers, and other cold applications exposed to chemicals. Made with an FEP casing, these O-rings are protected against chemicals such as methanol and boric acid.

Also known as Boss O-rings, these O-rings are used in tube fittings with a straight-thread connection. Made of PTFE, they withstand extreme temperatures and harsh chemicals such as fluorinated solvents, ethanol, and acetone.

Made of Kalrez 4079, these O-rings combine the chemical resistance of PTFE with the springy softness of Viton® fluoroelastomer.

Able to withstand the widest range of chemicals of any Kalrez O-ring, these Kalrez 6375 O-rings are often used for chemical processing and applications involving steam.

Also known as Boss O-rings, these O-rings are made for tube fittings with a straight-thread connection. Made of Kalrez 4079, they combine the chemical resistance of PTFE with the springy softness of Viton® fluoroelastomer.

Also known as Boss O-rings, these O-rings are made for tube fittings with a straight-thread connection. They’re fluorosilicone, which stays flexible in temperatures as low as -65° F, so they form better seals than Viton® fluoroelastomer O-rings in cold environments.

When you need an O-ring that’s not an industry standard size, we can make one to fit your requirements.

Get the same chemical and heat resistance as Kalrez 4079 without the brand name. Even at 600° F, these FFKM O-rings resist a wide range of chemicals, including acetone, methyl ethyl ketone (MEK), potassium hydroxide, and most acids.

Easier to compress than standard silicone O-rings, these O-rings create a better seal in enclosures, reservoirs, and other low-pressure equipment. They can withstand temperatures up to 400° F.

Softer than standard silicone O-rings, these O-rings form a better seal in enclosures, reservoirs, and other low-pressure equipment. They withstand temperatures up to 400° F or higher. Also known as Boss O-rings, they’re made for tube fittings with a straight-thread connection.

Made and bagged in an ISO Class 7 (Fed. Std. Class 10,000) clean room, these are the highest purity high-temperature O-rings we offer.

If these O-rings deteriorate and fall in your line, they’ll be caught by metal- and X-ray-detection systems.

Made of EPDM, these O-rings have excellent resistance to water, steam, and glycol-based fluids, including brake fluid.

When you need an EPDM O-ring that’s not an industry standard size, we can make one to fit your requirements.

Soft and pliable, these O-rings create a better seal in low-pressure applications than standard EPDM O-rings. They resist water, steam, and glycol—you can also use them outdoors.

Harder than standard EPDM O-rings, these O-rings are more resistant to abrasion and wear.

Also known as boss O-rings, these neoprene O-rings seal straight-thread fittings in valve housings, outdoor enclosures, and saltwater applications.

This cord stock is softer and creates a better seal in low-pressure applications than standard Buna-N cord stock.

Made of FDA-listed material for use with food and beverage, this cord stock resists animal and vegetable oils, citric acid, sodium bicarbonate, and grease.

Harder than standard Viton® fluoroelastomer cord stock for better wear resistance.

Create seals for equipment used in food, beverage, or pharmaceutical lines—this cord stock is FDA compliant for direct contact with food. Made of Viton® fluoroelastomer, it resists benzene, ethylene glycol, and other harsh chemicals.

Made from Santoprene, this cord stock combines the flexibility of rubber with the durability of plastic. It holds up to weather and harsh chemicals, such as acetic acid and potassium hydroxide, without cracking or tearing.

This cord stock is softer and creates a better seal than standard silicone cord stock in low-pressure applications up to 400° F.

In addition to water and steam, this EPDM cord stock resists diluted salt solutions, ethanol, and isopropyl alcohol.

Often used in marine environments, this neoprene cord stock resists moisture, salt water, and UV rays.

All of the O-rings in these assortments are made of Buna-N. They resist animal, vegetable, and motor oils.

Stock a variety of sizes so you always have the O-ring you need. With a 90A durometer, the O-rings in these assortments are harder and more wear-resistant than standard Buna-N O-rings.

Rigid and hard with a slippery surface, these O-rings resist harsh chemicals, such as acetone, fluorinated solvents, methanol, and boric nitric, and sulfonic acids.

Also known as Boss O-rings, these hard Viton® fluoroelastomer O-rings are for use in tube fittings with a straight-thread connection. They offer excellent resistance to wear.

In addition to water and steam, these EPDM O-Rings resist ethanol and ethylene glycol.

Keep a variety of sizes handy so that you always have the O-ring you need. The HNBR O-rings in these assortments are a step up from Buna-N O-rings—they contain extra hydrogen to better resist chemicals, weather, and abrasion.