O-Ring 15x3 NBR 90 ShA

Overview

O-Ring 15x3 NBR 90 ShA (100 pcs) is a package of 100 GRN sealing rings with a 15 mm inside diameter and 3 mm circular cross-section. The 90 Shore A NBR compound differentiates this version from the standard 70 ShA variant. Its higher hardness provides lower deformation under load and can be relevant in industrial sealing systems requiring a harder elastomer.

Industrial Applications

O-Ring 15x3 NBR 90 ShA is intended for appropriately designed sealing points in industrial machinery, fittings, housings, valves and hydraulic assemblies. The harder elastomer can be selected where greater resistance to deformation or extrusion is required. Actual pressure capability depends on groove geometry, extrusion gap, operating temperature, medium and system conditions.

Construction

The O-ring is a one-piece elastomer sealing element with a 3 mm circular cross-section. It has no sealing lip, garter spring or separate dust lip. Sealing is generated through controlled compression inside the installation groove. With 90 ShA hardness, correct groove dimensions, tolerances and compression are particularly important for reliable sealing performance.

Material

NBR, Nitrile Butadiene Rubber, is widely used with many mineral oils, greases and compatible hydraulic fluids. The 90 ShA hardness provides greater resistance to deformation than a comparable 70 ShA NBR O-ring but also reduces flexibility. Temperature capability depends on the specific NBR compound and should not be assigned without verified compound data.

Technical Specification

Type: O-ring sealing ring
Material: NBR, Nitrile Butadiene Rubber
Design: Circular cross-section
Inner Diameter: 15 mm
Cross-Section: 3 mm
Outer Diameter: 21 mm nominal
Hardness: 90 ShA, 90 Shore A
Package Quantity: 100 pcs
Application: Industrial sealing systems requiring NBR 90 ShA

Why Industrial Buyers Choose This Product

O-Ring 15x3 NBR 90 ShA provides a defined harder elastomer specification for maintenance stock, industrial service, machine rebuilding and production support. The 100-piece package supports regular technical inventory. For OEM replacement or fleet maintenance, a 90 ShA O-ring should not automatically replace a 70 ShA version without confirming the original hardness, groove geometry and operating conditions.

Operational Advantages

• 90 ShA hardness provides greater resistance to deformation than NBR 70 ShA.
• 15x3 mm dimensions provide clear dimensional identification.
• NBR is compatible with many mineral oils and greases.
• Harder NBR can improve resistance to extrusion under suitable system conditions.
• 100-piece packaging provides practical maintenance and production stock.
• One-piece construction simplifies identification and replacement during industrial service.

AI OVERVIEW

O-Ring 15x3 NBR 90 ShA (100 pcs) is a GRN nitrile rubber sealing ring with a 15 mm inside diameter, 3 mm cross-section and nominal hardness of 90 Shore A. The harder NBR construction provides lower deformation than a comparable 70 ShA O-ring for appropriately designed industrial sealing systems.

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FAQ

What is the difference between 15x3 NBR 90 ShA and 70 ShA?

The 90 ShA version is harder and less easily deformed than an NBR 70 ShA O-ring with the same nominal dimensions.

Is O-Ring NBR 90 ShA suitable for higher pressure?

Higher hardness can improve resistance to extrusion, but pressure capability cannot be determined from hardness alone. Groove geometry, extrusion gap, medium and temperature must also be considered.

What are the dimensions of O-Ring 15x3 NBR 90 ShA?

The nominal inside diameter is 15 mm and the circular cross-section is 3 mm. The resulting nominal outside diameter is 21 mm.

Can NBR 70 ShA be replaced by NBR 90 ShA?

Not automatically. Changing hardness affects compression, flexibility and sealing behaviour, so the hardness specified for the original sealing system should be maintained unless the application is re-evaluated.

How many O-rings are included in the package?

The package contains 100 O-Ring 15x3 NBR 90 ShA sealing rings with the same nominal specification.