Description
Overview:
This nitrile rubber O‐ring is a compact, round-section seal designed for dependable leak prevention in machinery and pipework. It measures 29.74 mm inner diameter (ID) x 3.53 mm cross‐section (CS) x 36.80 mm outer diameter (OD). Made from black NBR (nitrile) with a 70 Shore A hardness, it offers a balanced mix of flexibility and strength for secure static and light dynamic sealing. It is suitable for hydraulic fittings, pumps, valves, cylinders, automotive assemblies, and general plumbing connections found across construction equipment, garden machinery, compressors, and pressure systems. The oil‐resistant compound helps maintain seal integrity with common lubricants and fuels, supporting reliable performance in demanding workshop and site conditions where a precise metric fit and consistent compression are required.
Key Features:
- 29.74 mm ID x 3.53 mm CS x 36.80 mm OD for precise metric fit
- Nitrile (NBR) 70 Shore A for a reliable balance of resilience and flexibility
- Oil and fuel resistant for use with mineral oils, greases, and many hydrocarbons
- Suitable for static and light dynamic sealing in hydraulic and pneumatic assemblies
- Smooth, round cross-section for consistent compression and sealing contact
- Meets ASTM D2000 standards for material quality and heat resistance
- Compression performance verified at 100°C for 22 hours
- Straightforward to install in standard 3.53 mm CS metric glands
- Durable compound for long service life in workshop and site environments
- Black finish for easy identification as standard NBR 70 grade
Typical Applications:
Sealing of hydraulic couplings, valves, and cylinder end caps; sump plugs and general automotive housings; fuel and oil system fittings; water and air line unions; pumps and gearboxes on construction plant; hose tails and adaptors; garden machinery components such as pressure washer pumps and small engine covers where a 3.53 mm cross‐section O‐ring is specified.
Also known as:
O ring, O‐ring seal, NBR O‐ring, Buna‐N O‐ring, rubber sealing ring, gasket ring, round seal, metric O‐ring 29.74 x 3.53, 70A O‐ring, nitrile seal ring.
Product Specifications
| L&S Part No. | 897 300 |
|---|---|
| Unit of Sale | Each |
| Key Features | - 29.74 mm ID x 3.53 mm CS x 36.80 mm OD - Nitrile (NBR) 70 Shore A for resilience - Oil and fuel resistant for mineral oils - Suitable for hydraulic and pneumatic assemblies - Meets ASTM D2000 standards for quality |
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