Stock a variety of O-rings, so you always have the size you need. The O-rings in these assortments have flat edges on all four sides, so they cover more surface area than round-profile O-rings. This creates a better seal in static applications, such as hose, pipe, and faucet connections. However, these O-rings don’t perform as well in dynamic applications, where the flat edges cause higher friction that leads to increased wear. Made from Buna-N, they resist tearing and stand up to hydraulic 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. They resist petroleum and grease, so they’re often used in hydraulic and pneumatic systems.

Keep a range of O-rings handy so you always have the size you need. Made of PTFE, the O-rings in these assortments withstand extreme temperatures and harsh chemicals such as acetone, fluorinated solvents, and ethanol. They’re also rigid, which makes them more difficult to install than flexible O-rings. You’ll find them in pump shafts, mixing tanks, and other equipment that processes chemicals or pharmaceuticals. They’re also FDA compliant for direct contact with food.

Keep a selection of sizes on hand so you always have the O-ring you need. The O-rings in these assortments have four points of contact to create a strong seal. They’re often used on moving parts, such as pistons and rotating shafts. Also known as Quattro seals and X-rings, they resist rolling and twisting better than O-rings with a round or square profile. They also require less compression to seal, which reduces friction and extends their service life. Made of Buna-N, these O-rings are resilient and tear resistant. They resist hydraulic and motor oil.

Keep a range of sizes on hand so that you always have the O-ring you need. These assortments include 584 EPDM O-rings and 584 silicone O-rings. EPDM O-rings have excellent resistance to water, steam, and glycol-based fluids, including brake fluid. They’re often used to seal chemical processing equipment and refrigeration systems, since they won’t swell or break down in moist environments. Silicone O-rings can withstand temperatures up to 450° F. They're FDA compliant for direct contact with food, so they're frequently used on hot food lines. They’re also used to seal HVAC systems.

Keep a range of sizes on hand so that you always have the O-ring you need. Also known as boss O-rings, the O-rings in these assortments 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. They withstand motor oil, hydraulic fluid, and mild chemicals, so they're often installed in hydraulic and pneumatic systems.

These 325-piece assortments mean you’ll always have a backup ring on hand. Use them to extend the life of your O-rings and improve their performance in high-pressure applications. The backup rings are made of PTFE and resist harsh chemicals such as, acetone, fluorinated solvents, methanol, and many acids.

This assortment contains 584 Buna-N O-rings that resist oil and 584 Viton® fluoroelastomer O-rings that resist boric acid, fuels, and transmission fluid. These O-rings have a round profile and are suitable for a wide range of static and dynamic sealing applications. All are sized to the SAE standard AS568.

Always have the backup ring you need for oily equipment operating at pressures up to 2,500 psi. These rings support O-rings to extend their life and prevent them from deforming under pressure, which can cause pressure loss. Made of Buna-N, they won’t swell when exposed to grease, petroleum fluids, and motor oil. However, they will degrade when exposed to mild or harsh chemicals. They’re often used in hydraulic and automotive systems.

Able to withstand heat up to 450° F, the O-rings in these assortments are silicone and maintain a strong seal even when the temperature rises. All have a round profile and are suitable for a wide range of static and dynamic sealing applications. These O-rings are sized to the SAE standard AS568.

Stock a variety of O-rings, so you always have the size you need. The O-rings in these assortments are made for tube fittings with a straight-thread connection--they're also known as Boss O-rings. With a 90A durometer, they’re harder and more durable than standard Viton® fluoroelastomer O-rings. Use them to seal high-pressure parts, such as fuel injectors. They resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol. To install, place them behind the threads on a male fitting. As you tighten against a female fitting, the O-ring compresses to form a tight seal.

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. They won’t swell from contact with grease and acid, making them a good choice in engine, hydraulic, and HVAC systems. Because they won’t deteriorate from ozone, UV, or oxidation, these O-rings are also good for outdoor use. However, they won’t withstand solvents or strong acids like Viton® fluoroelastomer O-rings do. They’re also known as hydrogenated nitrile and highly saturated nitrile O-rings.

Keep a variety of sizes on hand so you always have the right O-ring for the job. The O-rings in these assortments have four points of contact for a better seal in moving parts than round-profile O-rings. Since they require less compression to make a seal, they also last longer. Made of Viton® fluoroelastomer, these O-rings resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol. They’re also known as Quattro seals and X-rings.

Stock a variety of sizes, so you always have the right O-ring for the job. With a 90A durometer, the O-rings in these assortments 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. They also resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol.

With a variety of O-rings handy, you’ll always have the right size for the job. The O-rings in these assortments are made of Viton® fluoroelastomer, so they won’t break down from exposure to chemicals such as sulfuric acid, butyl alcohol, and ethylene glycol. They’re also FDA compliant for direct contact with food. Since they’re softer and easier to compress than standard Viton® O-rings, they form a better seal in low-pressure applications. They offer the same oil resistance as Buna-N O-rings and withstand high temperatures, making them ideal for food lines with hot oil.

Keep a range of sizes on hand so you’re never missing the O-ring you need. Made of silicone, the O-rings in these assortments can withstand temperatures up to 400° F or higher. They’re FDA compliant for direct contact with food, so they’re often used on hot food lines. They’re also used to seal HVAC systems.