Rubber O Ring BS146 Nitrile 70 Size Size 66.34 x 2.62mm Pack of 5

Ensuring proper sealing performance across mechanical systems requires accurate component sizing and resilient elastomer performance. The BS146 Nitrile 70 Rubber O-Ring is specifically designed to meet these operational requirements, serving as an essential component for maintaining fluid and gas containment in demanding equipment.

Manufactured in accordance with the standard British Standard size BS146, this O-ring features an inside diameter of 66.34mm and a cross-sectional thickness of 2.62mm. These precise dimensions allow the ring to seat securely within properly sized glands, creating a reliable compression barrier when assembled between mating surfaces. Whether installed in static joint faces or dynamic mechanical housings, the ring maintains consistent contact pressure to suppress fluid migration and protect system integrity.

The material composition utilizes Nitrile rubber rated at 70 durometer hardness (Nitrile 70 / NBR 70). This specific Shore A durometer hardness represents an optimal balance between flexibility for ease of installation and hardness required to resist extrusion under pressure. Nitrile is widely recognized in engineering applications for its exceptional inherent resistance to petroleum-derived fuels, mineral oils, silicone greases, hydraulic fluids, and water. This chemical stability minimizes swelling, softening, or premature hardening when the ring comes into contact with process fluids.

In application, the elastomeric property of the BS146 Nitrile 70 seal allows it to deform under mechanical loads to fill microscopic surface irregularities on flange faces and shafts. Upon release of pressure or during routine system cycles, the material retains its memory, resuming its baseline geometric profile to deliver ongoing service life. The simplicity of its circular profile combined with robust material engineering makes it an economic, highly practical component for maintenance engineers, equipment technicians, and original equipment manufacturers.

Integrating quality seals like the BS146 Nitrile 70 O-ring into preventative maintenance routines helps prevent system downtime, reduces fluid waste, and prolongs the lifespan of connected machinery.