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.

A slick surface treatment makes these O-rings easy to seat without tearing or rolling. The lack of friction also helps create a long-lasting seal in dynamic applications, no lubrication required.

FDA compliant for direct contact with food, these Buna-N O-rings create a strong seal in food and beverage lines.

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.

With a 90A durometer, these O-rings are harder and more wear-resistant than standard Viton® fluoroelastomer O-rings. They hold up to the high pressures in fuel injectors and heavy duty hydraulic cylinders.

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.

Also known as Boss O-rings, these O-rings are made for tube fittings with a straight-thread connection. Made of Viton® fluoroelastomer, they resist a variety of chemicals, including benzene, butyl alcohol, and ethylene glycol.

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.

Spot when O-rings aren’t seated properly or identify sizes at a glance—these O-rings come in high-contrast colors.

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.

Made of Viton® fluoroelastomer, these O-rings meet MIL-R-83248 standards. They stay strong when used with chemicals such as benzene, butyl alcohol, and ethylene glycol.

Our most chemical-resistant Viton® fluoroelastomer O-rings. Made of Viton® ETP, these O-rings stay strong when used with harsh chemicals including acetone, MEK, and sodium hydroxide. They also keep their elasticity and shape under constant motion in steam and heat.

Made from PTFE, these O-rings withstand extreme temperatures and harsh chemicals such as acetone, fluorinated solvents, and ethanol.

Pair these O-rings with metric sanitary fittings, which are commonly known as aseptic fittings. Made of PTFE, they’re rigid with a slippery surface and resist harsh chemicals such as acetone, fluorinated solvents, methanol, and boric acid.

Made for demanding applications, these Kalrez 7075 O-rings hold their shape even after repeated rubbing or compression. More durable than Kalrez 4079 O-rings, they also have higher tensile strength and heat resistance.

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.

An FEP casing protects these O-rings from moisture and harsh solvents such as acetone, methanol, and boric acid. If the casing wears away, the Viton® fluoroelastomer core will continue to ward off chemicals.

Often used in drilling systems, these Aflas O-rings hold up to petroleum fluids. They also withstand steam and chemicals such as ammonia, calcium hydroxide, and boric acid.

The same chemical and heat resistance as Kalrez 4079 without the brand name. Also known as boss O-rings, these O-rings are sized to fit straight-thread fittings to prevent leaks.

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.

If these O-rings deteriorate, they can be picked up by metal detection systems.

Use these O-rings in temperatures up to 400° F. Made of Parker S1138 silicone, they’re pure enough for food or pharmaceutical applications—they’re USP VI certified.

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.

Made of FDA-compliant EPDM, these O-rings are safe for direct contact with food. They hold up to a wide range of temperatures, and they won’t degrade from steam or water.

Use these O-rings with metric sanitary fittings, which are also called aseptic fittings. Made of EPDM, they resist water, steam, ethanol, and ethylene glycol.

Also known as Boss O-rings, these O-rings are for use in tube fittings with a straight-thread connection.

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.

Softer and easier to compress than Viton® fluoroelastomer, this fluoroelastomer cord stock creates tighter seals on uneven surfaces.

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.

Our most chemical-resistant cord stock. Made of Viton® ETP fluoroelastomer, this cord stock resists steam and harsh chemicals, including hydrochloric acid, sodium hydroxide, and other strong acids and bases.

Often used to seal ovens and other food processing equipment, this silicone cord stock withstands heat up to 450° F. It’s made with metal and chemical additives that will set off metal detectors and X-ray machines if a piece falls into your line.

Create custom silicone gaskets that meet MIL-G-21610C standards for use in heat exchangers.

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.

Keep a variety of sizes on hand so that you always have the O-ring you need. The O-rings in these assortments are softer than standard Buna-N O-rings, so they form a better seal in low-pressure applications.

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.

These assortments contain a mix of Buna-N O-rings that resist oil and Viton® fluoroelastomer O-rings that resist boric acid, fuels, and transmission fluid.

Able to withstand heat up to 450° F, these O-rings maintain a strong seal even when the temperature rises.

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.