Description
Overview:
This metric O-ring is a general-purpose seal made from black nitrile rubber (NBR) with a 70 Shore A hardness. It measures 72.75 mm inner diameter (ID), 1.78 mm cross-section (CS), and 76.31 mm outer diameter (OD), making it suitable for slim gland spaces while maintaining reliable sealing performance. Designed to stop leaks in static and light dynamic joints, it is commonly used on hydraulic systems, pumps, valves, engines, compressors, and plumbing connections across construction and garden machinery. The nitrile compound offers strong resistance to mineral oils, diesel, hydraulic fluids, and everyday workshop environments. Compliant with ASTM D2000 M2 BG714, it provides dependable performance under heat and compression. Manufacturer Part Number (MPN): 897 227.
Key Features:
- Metric size: 72.75 mm ID x 1.78 mm CS (76.31 mm OD) for compact grooves and precise fit
- Nitrile (NBR) 70 ShA compound balances flexibility with strength for consistent sealing
- Good resistance to oils, fuels (e.g. diesel), hydraulic fluids, and common workshop conditions
- ASTM D2000 M2 BG714 compliance indicates reliable performance under heat and compression
- Designed for static and light dynamic applications in pumps, valves, pistons, and covers
- Smooth moulded finish helps reduce abrasion and aids easy installation when lightly lubricated
- Stable compression set characteristics help maintain long-term seal integrity
- Suitable for maintenance and repair across construction plant, agricultural, and garden machinery
- Works in narrow glands where a 1.78 mm cross-section is required
- Black colour for discreet fit in assemblies
Typical Applications:
Sealing hydraulic fittings, pump housings, valve covers, gearboxes, fuel system components, coolant connections, and general plumbing joints. Common in excavators, compact loaders, pressure washers, generators, compressors, and garden machinery such as mowers and tillers. Ideal for replacing worn seals during routine servicing and leak repairs.
Also known as:
Rubber sealing ring, metric nitrile O-ring, NBR O-ring, oil-resistant ring seal, round section gasket, 70 Shore A O-ring, hydraulic seal ring, metric gasket ring, pipe union seal, service seal.
Product Specifications
| L&S Part No. | 897 227 |
|---|---|
| Unit of Sale | Each |
| Key Features | - 72.75 mm ID x 1.78 mm CS for compact grooves - Nitrile rubber resists oils, fuels, and hydraulic fluids - ASTM D2000 M2 BG714 compliant for heat and compression - Suitable for static and light dynamic applications - Ideal for hydraulic systems, pumps, and valves |
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