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O-rings are small but crucial components used in a wide range of applications, from plumbing to automotive systems. Ensuring you select the correct o-ring material, size, and hardness is essential for preventing leaks, maintaining proper function, and extending the lifespan of your equipment. This guide will help you navigate the key considerations for choosing the right o-rings.
Multiple Sizes: o-ring assortment kit contains 20 metric rubber o-rings, (IDxCS): 1x2, 2.5x1, 3x1, 4x1, 4.5x1, 5x2, 6x2, 7x2, 8x2, 9x2, 10x2, 12x3, 13x3, 14x2.5, 16x2, 17x2.5, 18x2, 20x2, 22x2, 25x2.4mm. Which can meet almost all of your needs
High quality material: O-ring bushings are made of commercial grade NBR material with a working temperature range of -40℉/-40℃ to 248℉/120℃. With excellent resistance to high and low temperatures, it is very suitable for thermal machinery...
Wide applications: O-ring classification is very suitable for faucets, high-pressure washers, motorcycles, boats, car engines, pumps, solenoid valves, meters, sensors, mechanical bearings, pressure pipes and other accessories for sealing DIY repairs
Easy to use and store: Various o-ring kits, 20 sizes of o-rings are placed in order in a sturdy plastic storage box, each size comes with a detailed label paper, very easy to use, o-rings are stored in order of size, easy to retrieve and store
{WIDE APPLICATION} O ring kit for faucets,plumbing,pressure washer,hose nozzles,sinks,filters,hydraulics fluid,auto engines, machinery bearings,pumps,boats,oils,gas control valve, spray, air,kitchen bathroom water fitting seal leak repair
{MULTIPLE SIZE} Metric oring assortment kits contains the most commonly used 22 size ID:(3mm, 4mm, 4.5mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 13mm, 14mm, 17mm, 18mm, 20mm, 22mm, 25mm, 27mm) x Thk:(1mm, 2mm, 2.4mm, 2.5mm, 3mm, 4mm),can meet almost all...
{MATERIAL} Rubber o rings set made of high-quality commercial grade black nitrile(NBR,Buna-N),it has excellent high temperature and low temperature resistance,the working temperature range is from -40℃/-40℉ to 120℃/248℉,maintains good...
{CONVENIENT STORAGE} Assorted o rings rubber are placed in a sturdy plastic storage box, each size with detailed label paper,are stored in order of small to large for easy retrieval.It can be used for months or even years rather than buying them at a...
Wide Range of Applications: This O-ring assortment kit is ideal for use in faucets, plumbing, pressure washers, hose nozzles, sinks, filters, and automotive engines.It's good for sealing and repairing mechanical bearings, pumps, boats, oil and gas control...
Assortment of Sizes: The kit includes 500 rubber O-rings in 20 different sizes, ensuring you always have the right fit for your projects. These O-rings are essential for various sealing tasks, making it a must-have for both professionals enthusiasts.With...
Premium Quality Rubber O-Rings: Made from high-grade Nitrile Butadiene Rubber (NBR), these O-rings are highly durable and resistant to wear, deformation, corrosion, and extreme temperatures ranging from -40°F to 248°F (-40°C to 120°C).Whether you're...
Convenient Classification: Each O-ring is stored in a sturdy plastic case with individual compartments, clearly labeled for easy identification and retrieval. The detailed size chart helps you find the exact O-ring quickly, saving you time and effort...
{WIDE APPLICATION}：Rubber O-ring kit for faucets plumbing,pressure washer, hose nozzles, sinks,filters,hydraulics fluid,auto engines, machinery bearings,pumps,boats,oils,gas control valve, spray,air,kitchen bathroom water fitting seal leak repair.A
{MULTIPLE SIZE}：Assorted o ring washer gasket assortment set contains 32 Metric size...
{INCLUDED TOOLS}：O rings Rubber kits comes with 4-Piece precision pick and hook set, includes 1-pc. full hook; 1-pc. 45-degree pick; 1-pc. 90-degree pick; 1-pc. straight pick, each is designed with high torque acetate handles and precision tips for use...
{HIGH-QUALITY MATERIAL}：Black o rings set made of high-quality commercial grade nitrile rubber (NBR) material, it has excellent high temperature and low temperature resistance, the working temperature range is from -40℉ (-40℃) to...
Package Including: O ring kit contains 1050 PCS in 21 sizes, a wide range of sizes and quantities will meet your needs
Multiple Sizes: The o ring assortment kit contains 21 sizes, o-rings with inner diameters from 1 to 25mm and thicknesses of 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 24mm
Easy Storage: Comes in a handy plastic organizer case with sized compartments, each size comes with a label for easy picking and storage
High Quality Material: O ring kit bushings are made of commercial grade NBR material with a working temperature range of -40℉/-40℃ to 248℉/120℃, which is an excellent resistance to high and low temperatures
VALUE PACK: This O-ring assortment kit contains 1020 pieces in 20 commonly used metric sizes. It covers a wide range of inner diameters from 1 to 25mm, making it perfect for automotive, plumbing, mechanical and household maintenance.
PREMIUM MATERIAL: Crafted from commercial-grade 70 Duro NBR (Buna-N) rubber, these O-rings resist oil, heat, water, and aging. With a working temperature of -40℉ to 248℉ (-40℃ to 120℃), they ensure long-lasting durability in demanding...
WIDE APPLICATION: Ideal for faucets, pressure washers, hydraulic systems, automotive engines, and DIY repairs. A reliable, versatile solution for mechanics, plumbers, and homeowners needing leak-free seals for any project.
EASY ORGANIZATION: Housed in a labeled, anti-mix case for instant selection. Stay organized and stop wasting time searching for the right size.
Multiple sizes:O-ring assortment kit contains standard 32 metric rubber O-rings with O-rings from 4 to 50 mm O.D. and 1 to 3.5 mm thick.Also comes with a 4-piece precision pick and hook set, including 1 pc. Full Hook; 1 pc. 45 degree pick; 1 pc. 90 degree...
High quality material: O-ring bushings are made of commercial grade NBR material with a working temperature range of -40℉/-40℃ to 248℉/120℃. With excellent resistance to high and low temperatures, it is very suitable for thermal machinery...
Wide applications: O-ring classification is very suitable for faucets, motorcycles, boats, car engines, pumps, solenoid valves, meters, sensors, mechanical bearings and other accessories for sealing DIY repairs, Hook and Pick Set for clamps, wires...
Easy to use and store: Various o-ring kits, 32 sizes of o-rings are placed in order in a sturdy plastic storage box, each size comes with a detailed label paper, very easy to use, o-rings are stored in order of size, easy to retrieve and store
O-RING ASSORTMENT KIT: NEIKO introduces our Rubber O-Ring Assortment Kit. Each O-ring acts as a joint gasket to seal and protect water lines in any oil line, faucet, sink, filter, toilet, or other machinery.
VERSATILE & RELIABLE: Thanks to the NBR construction, these rubber O-rings are resistant to water, UV, lubricants, hydraulic fluids, gasoline, alkalis, and grease. Each O-ring creates a long-lasting seal that protects your devices from leaks.
DURABLE O-RING KIT: Each pliable O-ring in this set has a high-quality construction and a thick wall design to provide long-lasting durability. The rings are made of commercial-grade nitrile butadiene rubber for liquid resistance.
COMPACT SIZE: Our O-ring kit comes organized in a case by ring size and shape. Carry this seal tool set with you wherever you’ve got a leak that needs extra sealing protection and be ready to protect against leaks from water and other liquids.
WIDE APPLICATION:SAE rubber o-ring kit for cars hydraulics auto engines,plumbing faucets pressure washer hose nozzles gas control valve spray air water fitting seal leak pneumatic repairs
MULTIPLE SIZE:Assorted SAE o ring assortment set contains inch size ID...
INCLUDED TOOLS:SAE O rings Rubber kits comes with 4-pcs precision pick and hook set, includes 1 pc full hook;1 pc 45-degree pick;1 pc 90-degree pick;1 pc straight pick,each is designed with handles and precision tips
407 PCS 32 SAE SIZE:Assorted Universal SAE O Ring kit Inch ID Includes...
419 PCS 32 METRIC SIZE:Assorted metric o ring assortment set Includes universal mm ID: 3mm, 4.4mm, 5mm, 7mm, 10mm, 11mm, 13mm, 14mm, 16mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23.5mm, 25mm, 26mm, 28mm, 30mm, 31mm, 33mm, 34mm, 36mm, 38mm, 41mm, 44mm, 47mm, 50mm X...
PROFESSIONAL MATERIALS:O Rings constructed from premium, commercial-grade black nitrile,it has excellent resistance to both high temperature and low temperature, the operating temperature range is from -22℉ (-30℃) to +248℉ (+120℃).It has good...
4 TYPES OF HOOKS INCLUDED:O-Rings assortment kit comes with 4-Piece precision pick and hook set, includes 1 pc full hook; 1 pc 45-degree pick; 1 pc 90-degree pick; 1 pc straight pick, each is designed with high torque acetate handles and precision tips...
Last update on 2026-10-09 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best O-Rings
Understanding O-Ring Materials
Nitrile (Buna-N): This is the most common and cost-effective material, offering good resistance to oils, fuels, and general chemicals. It's suitable for many everyday applications but has limited resistance to ozone and UV exposure.
Viton (FKM): Known for its excellent resistance to high temperatures, chemicals, oils, and fuels. Viton is a premium choice for demanding environments where durability and longevity are paramount.
Silicone: Offers a wide temperature range, good flexibility, and resistance to weathering and ozone. Silicone is often used in food-grade applications and where extreme temperatures are a factor.
EPDM: Stands out for its superior resistance to weathering, ozone, steam, and water. EPDM is ideal for outdoor applications and systems involving hot water or steam.
Key Size and Hardness Considerations
Inner Diameter (ID) and Outer Diameter (OD): O-rings are typically specified by their ID and cross-section (CS). Accurate measurement is critical for a proper seal. Ensure the o-ring fits snugly within its groove without being too tight or too loose.
Durometer (Hardness): Measured on the Shore A scale, durometer indicates the material's hardness. Softer o-rings (lower durometer) conform better to irregular surfaces but may be less durable. Harder o-rings (higher durometer) offer better resistance to extrusion and wear but require more compression to seal.
Application-Specific Needs
Consider the environment the o-ring will operate in. Factors like temperature extremes, exposure to specific chemicals, pressure, and movement (static vs. dynamic) will dictate the best material and type. For dynamic applications (like pistons or rotating shafts), choose o-rings designed for reduced friction and wear.
Frequently Asked Questions
How do I measure an o-ring?
To measure an o-ring, you'll need to determine its Inner Diameter (ID), Outer Diameter (OD), and Cross-Section (CS). The ID is the diameter of the hole in the center. The OD is the diameter across the entire ring. The CS is the diameter of the ring's cross-section itself, typically measured at its widest point.
What is the difference between static and dynamic applications for o-rings?
A static application involves an o-ring that does not move relative to the surfaces it seals. A dynamic application means the o-ring will experience motion, such as in a piston or a rotating shaft. Dynamic applications require o-rings with materials and designs that can withstand friction and wear.
Can I use an o-ring made of a different material than the original?
While it might be possible, it's generally recommended to use an o-ring made of a material compatible with the fluid or environment it will encounter. Different materials have varying resistances to chemicals, temperatures, and pressures, which can affect seal performance and longevity.
How important is the durometer (hardness) of an o-ring?
Durometer is important as it affects how well the o-ring can conform to sealing surfaces and its resistance to extrusion. Softer o-rings seal better on imperfect surfaces, while harder o-rings are more resistant to damage under high pressure.
What does 'Buna-N' mean for an o-ring?
Buna-N is another name for Nitrile rubber, which is a very common and versatile material for o-rings. It offers good resistance to oils, fuels, and water, making it suitable for a wide range of general-purpose sealing applications.
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