O-ring 28x2 NBR 90 ShA - 100 pcs
6 packs
€6.24
(net)
Price for: 100pcs.
O-ring 28x2 NBR 90 ShA with a nominal inside diameter of 28 mm and a 2 mm cross-section. Made from nitrile butadiene rubber NBR with a hardness of 90 Shore A. Supplied in packs of 100 pcs. Selection should consider the operating medium, temperature, pressure and groove geometry. Available from simmering.pl with stock in Poland for industrial, MRO, service and B2B customers.
O-ring 28x2 NBR 90 ShA - 100 pcs
O-ring 28x2 NBR 90 ShA is an elastomeric sealing ring with a nominal inside diameter of 28 mm and a cross-section of 2 mm. It is made from nitrile butadiene rubber NBR with a hardness of 90 Shore A. The product is supplied in packs of 100 pcs.
Technical data
| Parameter | Value |
|---|---|
| Product type | O-ring |
| Size | 28x2 mm |
| Inside diameter ID | 28 mm |
| Cross-section CS | 2 mm |
| Material | NBR |
| Hardness | 90 ShA |
| Package quantity | 100 pcs |
What does O-ring size 28x2 mean?
The designation 28x2 mm defines the two primary dimensions:
- 28 mm - nominal inside diameter ID
- 2 mm - cross-section CS
The 28 mm dimension does not refer to the outside diameter.
Based on nominal geometry, the approximate outside diameter is:
28 mm + 2 x 2 mm = 32 mm
For identification and ordering, the primary size remains 28x2 mm, meaning inside diameter x cross-section.
NBR - nitrile butadiene rubber
NBR is one of the most widely used elastomers in sealing technology. NBR O-rings are commonly used in applications involving many mineral oils, greases and other media compatible with the specific NBR compound.
Chemical resistance and permissible operating conditions depend on the particular compound, operating medium, temperature, pressure and sealing system design.
What does 90 ShA mean?
90 ShA means that the elastomer has a nominal hardness of 90 on the Shore A scale.
Compared with commonly used 70 ShA NBR, a 90 ShA compound is harder and less easily deformed. This does not mean that 90 ShA is automatically the better choice for every application.
The correct hardness should be selected according to the sealing system, groove geometry, pressure, clearance and operating conditions.
NBR 90 ShA vs NBR 70 ShA
O-ring 28x2 NBR 90 ShA and O-ring 28x2 NBR 70 ShA have the same nominal dimensions but different elastomer hardness.
They should not automatically be considered interchangeable. Changing the hardness affects how the O-ring deforms, installs and behaves within the sealing system.
How to select an O-ring 28x2 NBR 90 ShA
Before ordering, verify:
- inside diameter: 28 mm
- cross-section: 2 mm
- material: NBR
- hardness: 90 ShA
- groove dimensions and geometry
- operating medium
- operating temperature
- pressure
- static or dynamic sealing conditions
The 28x2 mm size alone is not sufficient to confirm full interchangeability.
Installation
The groove and mating surfaces should be clean before installation. The O-ring should be installed evenly without twisting.
Avoid contact with sharp edges, threads and burrs that could cut, scratch or otherwise damage the elastomer.
Pack of 100 pcs
The product is supplied in packs containing 100 O-rings 28x2 NBR 90 ShA. This packaging format is suitable for industrial users, maintenance departments, service companies, manufacturers and B2B customers requiring repeat quantities of the same O-ring size.
Alternative designations and search references
This product may also be searched as:
- O-ring 28x2 NBR 90 ShA
- O-ring NBR 28x2 mm 90 ShA
- O-ring 28x2 NBR 90 Shore A
- NBR O-ring 28x2 mm
- O-ring 28 x 2 NBR 90
- O-ring 28x2 90 ShA
- O-ring 28x2 NBR 100 pcs
FAQ
What are the dimensions of O-ring 28x2?
The nominal inside diameter is 28 mm and the cross-section is 2 mm.
What is the outside diameter of a 28x2 O-ring?
Based on nominal geometry, the approximate outside diameter is 32 mm.
What does NBR mean?
NBR stands for nitrile butadiene rubber, an elastomer widely used for technical sealing components and O-rings.
What does 90 ShA mean?
90 ShA specifies a nominal elastomer hardness of 90 Shore A.
Is 90 ShA harder than 70 ShA?
Yes. NBR 90 ShA is harder and less easily deformed than NBR 70 ShA.
Can an O-ring 28x2 NBR 90 ShA be replaced with a 70 ShA version?
Not automatically. Although the nominal dimensions are identical, the different hardness affects the behaviour of the O-ring within the sealing system.
How many O-rings are included in one pack?
One pack contains 100 O-rings 28x2 NBR 90 ShA.
O-ring 28x2 NBR 90 ShA - key information
O-ring 28x2 NBR 90 ShA has a nominal inside diameter of 28 mm and a 2 mm cross-section. It is made from nitrile butadiene rubber with a hardness of 90 Shore A. The product is supplied in packs of 100 pcs. Correct selection should consider groove dimensions, operating medium, temperature, pressure and sealing conditions.
O-ring 28x2 NBR 90 ShA with a nominal inside diameter of 28 mm and a 2 mm cross-section. Made from nitrile butadiene rubber NBR with a hardness of 90 Shore A. Supplied in packs of 100 pcs. Selection should consider the operating medium, temperature, pressure and groove geometry. Available from simmering.pl with stock in Poland for industrial, MRO, service and B2B customers.