OSK™ O-Ring Kit K200X12N70 is a 200 piece general purpose AS568 O-Ring assortment with 12 popular Buna-N Nitrile 70 Duro sizes. This kit is built for maintenance shops, repair techs, service trucks, and general shop use where common inch O-Rings are needed fast. It helps reduce downtime by keeping useful replacement O-Rings organized and ready for oil, fuel, hydraulic oil, water, and general sealing repairs where Buna-N is compatible.
Benefits
The OSK™ 200 Piece O-Ring Kit helps customers finish common repairs faster without stopping to search for individual O-Rings.
- Keeps 12 popular AS568 O-Ring sizes ready for repair work
- Helps reduce downtime on equipment, pumps, valves, motors, and shop repairs
- Saves extra supply runs for common replacement O-Rings
- Makes size selection easier with an organized assortment
- Gives maintenance teams a practical stock of Buna-N 70 Duro O-Rings
- Helps service trucks and repair benches stay ready for everyday sealing needs
- Allows customers to refill used sizes instead of replacing the whole kit
This kit is more than a box of rubber O-Rings. It is a simple way to keep repairs moving when common O-Ring sizes are needed right away.
Correct Size Coverage
This 200 piece kit includes 12 popular AS568 inch O-Ring sizes. It covers small general repair sizes in 1/16", 3/32", and 1/8" cross sections.
| Size | AS568 Dash Number | ID | OD | CS | Quantity |
|---|
| O-Ring | -010 | 1/4" | 3/8" | 1/16" | 35 |
| O-Ring | -011 | 5/16" | 7/16" | 1/16" | 35 |
| O-Ring | -012 | 3/8" | 1/2" | 1/16" | 25 |
| O-Ring | -110 | 3/8" | 9/16" | 3/32" | 25 |
| O-Ring | -111 | 7/16" | 5/8" | 3/32" | 15 |
| O-Ring | -112 | 1/2" | 11/16" | 3/32" | 10 |
| O-Ring | -113 | 9/16" | 3/4" | 3/32" | 10 |
| O-Ring | -114 | 5/8" | 13/16" | 3/32" | 10 |
| O-Ring | -115 | 11/16" | 7/8" | 3/32" | 10 |
| O-Ring | -116 | 3/4" | 15/16" | 3/32" | 10 |
| O-Ring | -211 | 13/16" | 1-1/16" | 1/8" | 8 |
| O-Ring | -212 | 7/8" | 1-1/8" | 1/8" | 7 |
Total piece count: 200 O-Rings
SAE, Metric, or Specialty Kit Type
This is an SAE AS568 inch O-Ring assortment kit.
It is best used as a general repair O-Ring kit for common sealing needs. It is not a metric kit, Boss O-Ring kit, flange O-Ring kit, or specialty hydraulic fitting kit. Customers needing metric, Boss, flange, or face seal O-Rings should choose the kit that matches that repair type.
Material Compatibility
The O-Rings in this kit are Buna-N Nitrile, also called NBR. Buna-N 70 is one of the most common general purpose O-Ring materials because it works well in many oil and fuel based applications.
Buna-N is commonly used with:
- Petroleum oils and fluids
- Gasoline
- Hydraulic fluids
- L.P. gases
- Cold water
- Silicone greases and oils
- Di-ester base lubricants
- Ethylene glycol base fluids
Buna-N is not recommended for:
- Ketones such as MEK and acetone
- Phosphate ester hydraulic fluids such as Skydrol, Fyrquel, and Pydraul
- Halogenated hydrocarbons
- Nitro hydrocarbons
- Ozone exposure
- Sunlight and UV exposure
- Long-term outdoor weather exposure
- Automotive brake fluid
- Strong acids
For critical sealing applications, confirm the fluid, temperature, pressure, and environment before use.
Durometer and Seal Performance
These O-Rings are 70 Duro Buna-N.
Durometer means hardness. A 70 Duro O-Ring is the most common general purpose hardness for standard sealing work. It gives a good balance of flexibility, compression, and sealing performance.
70 Duro O-Rings are often used where the seal needs to compress into the gland and maintain contact against the sealing surface. This helps with general shop repairs, hydraulic and pneumatic equipment, pumps, motors, cylinders, and valves when the material is compatible.
For higher pressure fittings or areas where extrusion resistance is more important, a 90 Duro O-Ring may be a better choice.
Best Uses
This O-Ring assortment kit is a good fit for:
- Maintenance shops
- Service trucks
- Farm and equipment repair
- Manufacturing maintenance
- Automotive repair
- Hydraulic and pneumatic repairs where Buna-N 70 is suitable
- Pump and valve repair
- General shop repair
- OEM maintenance areas
- Field repair kits
This kit is not ideal for unknown chemicals, critical aerospace, medical, or highly specified applications unless the required material, hardness, certification, and traceability are confirmed before use.
Quality and Reliability
The OSK™ 200 Piece Buna-N O-Ring Kit is built as a practical repair and maintenance solution. It gives customers known sizes, known material, known hardness, and an organized selection of useful AS568 O-Rings.
A better kit helps reduce:
- Wrong-size repairs
- Wasted time
- Repeat failures
- Emergency supply runs
- Confusion during repair work
The O-Ring Store LLC is ISO9001:2015 certified. That means our team follows a quality system designed to support consistent products, clear processes, and better customer outcomes.
Organized Storage Case
This kit keeps 12 common O-Ring sizes together in one assortment. Organized storage helps the customer find the right O-Ring faster during a repair.
For shops and service trucks, this matters. A clear kit layout helps reduce time spent searching bins, bags, or loose parts. Faster size selection means faster repairs and less frustration.
Piece Count and Refill Value
This kit includes 200 total O-Rings across 12 popular AS568 sizes.
The value is not just the total piece count. The value is having useful sizes in practical quantities. The most common smaller sizes have higher piece counts, which helps the kit last longer in daily repair work.
When a compartment runs low, customers can reorder replacement O-Rings from The O-Ring Store LLC. This helps keep the kit working over time without buying a full new assortment every time the most used sizes run out.
Price and Buying Value
The OSK™ 200 Piece O-Ring Kit is a smart repair supply because it helps prevent downtime and keeps common O-Rings ready before a leak stops the job.
The real value is speed and readiness:
- Fewer trips to the parts counter
- Faster repairs
- Better shop organization
- Less time lost searching for common sizes
- Easy refill options when sizes run low
For maintenance teams and repair shops, a ready-to-use O-Ring assortment can pay for itself by helping avoid lost time on simple sealing repairs.
Before You Buy
Before ordering, confirm that this kit matches your repair need.
- Match the O-Ring size to the gland or original O-Ring
- Confirm the AS568 dash size when possible
- Match Buna-N material to the fluid, temperature, pressure, and environment
- Do not assume all rubber materials work in every fluid
- For critical applications, confirm required material, hardness, certification, and traceability before use
If the original O-Ring is swollen, cut, flattened, or damaged, measure the gland when possible instead of relying only on the old O-Ring.
Why Buy From The O-Ring Store LLC
The O-Ring Store LLC is an ISO9001:2015 certified O-Ring and seal distributor. We make getting O-Rings easy.
Customers get more than an O-Ring kit. They get clear sizing, practical product information, refill options, and support from a team that works with O-Rings and seals every day.
The value is speed, accuracy, service, and the ability to keep the kit working for the customer over time. That helps shops reduce downtime, avoid wrong-size repairs, and keep equipment moving.
FAQ
What is this O-Ring kit used for?
This kit is used for general O-Ring repair and maintenance where common AS568 Buna-N 70 O-Rings are needed.
Is this kit SAE or metric?
This is an SAE AS568 inch O-Ring kit. It is not a metric kit.
What material are the O-Rings?
The O-Rings are Buna-N Nitrile, also called NBR. They are black, 70 Duro, general purpose O-Rings.
Can I use this kit with hydraulic oil?
Yes, Buna-N is commonly used with many petroleum based hydraulic oils. Do not use it with phosphate ester hydraulic fluids unless compatibility is confirmed.
Can I refill the kit?
Yes. Used sizes can be reordered from The O-Ring Store LLC so the kit can stay stocked over time.
What is the difference between 70 Duro and 90 Duro?
70 Duro is the most common general purpose hardness. 90 Duro is harder and is often used for higher pressure fittings or where more extrusion resistance is needed.
