RS PRO Nitrile Rubber O-Ring, 21.54mm Bore, 28.58mm Outer Diameter

RS PRO metric O-Rings made from Nitrile, the most widely used elastomer in sealing applications. These O-Rings have an excellent resistance to petroleum products and work well in either low or high temperatures. Nitrile is highly resistant to abrasion and is an ideal choice in most industries.

• Nitrile rubber material
• Hardness 70 shore A
• Continuous operating temperature -40°C to 110°C, short term to 135°C
• Resistant to mineral hydraulic oils and greases
• Tolerance BS4518

Nitrile (NBR) is suitable for use within applications running at a maximum continuous temperature of 120°C (or up to 150°C intermittently). Use below -30°C requires special consideration. Seals and O-rings are used in various fields and industries including:
Automotive
Aerospace
General engineering

FAQs
Types of Seals and O-rings
Seals and O-rings come in various materials suited to different purposes. Some have a high temperature tolerance for use in both hot and cold applications, while others are made to be chemically resistant for use in lab or test equipment. Available in a wide range of sizes both in single size packs or in seal and O-ring kits for general maintenance. Sizes vary between seal and ring types both in diameter and thickness, these variations help provide an exact and precise seal to protect the joint. Both Metric and Imperial sizes are available to replace new and old seals and rings whether maintaining modern parts or older machines, engines and other mechanical parts.

Why RS PRO?
RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.

NBR is not suitable with Esters, Ozone, Retones, Aldehydes,Chlorinated and Nitro Carbons

Hardness: NITRILE 70 SHORE

'O' Rings

'O' ring seals available in a choice of three materials to suit different applications. All 'O' rings are supplied in bags of 50. The Nitrile 'O' rings are available in both Metric and Imperial sizes. Imperial sizes are to BS1806, Metric sizes are to BS4518.