OSK™ Industrial Metric O-Ring Kit 36 Sizes 500pc 2.5mm CS

500 Piece 2.5mm Cross Section Metric Buna-N 70 O-Ring Kit

This 2.5mm Cross Section O-Ring Kit starts at 4mm ID and goes to 21.5mm ID and comes in a plastic case to keep them organized.

Standard grade NBR Seals are typically resistant to mineral oil-based lubricants and greases, many grades of hydraulic fluids, aliphatic hydrocarbons, silicone oils and greases and water to about 80°C.

Material: 70 Durometer Buna-N - CS x ID

• 20pc - 2.5mm X 4mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 4.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 5mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 5.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 6mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 6.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 7mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 7.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 8mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 8.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 9mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 9.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 10mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 10.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 12.5mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 12.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 12.5mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 12.5mm Metric Buna-N 70 O-Rings
• 20pc - 2.5mm X 13mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 13.5mm Metric Buna-N 70 O-Rings
• 15pc - 2.5mm X 14mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 14.5mm Metric Buna-N 70 O-Rings
• 15pc - 2.5mm X 15mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 15.5mm Metric Buna-N 70 O-Rings
• 15pc - 2.5mm X 16mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 16.5mm Metric Buna-N 70 O-Rings
• 15pc - 2.5mm X 17mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 17.5mm Metric Buna-N 70 O-Rings
• 15pc - 2.5mm X 18mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 18.5mm Metric Buna-N 70 O-Rings
• 15pc - 2.5mm X 19mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 19.5mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 20mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 20.5mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 21mm Metric Buna-N 70 O-Rings
• 10pc - 2.5mm X 21.5mm Metric Buna-N 70 O-Rings

Buna-N O-Rings 70 Duro (NBR):

The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to petroleum base oils and hydrocarbon fuels. Nitrile materials also exhibit excellent tensile strength and abrasion resistance properties. The material performs well with most dilute acids, silicone oils and lubricants and in water applications. It is not recommended for use with ketones, aromatic hydrocarbons and phosphate ester hydraulic fluids. More than 50% of the O-Rings sold are Nitrile O-Rings, commonly used in hydraulic/pneumatic motors, cylinders, pumps and valves.

Buna-N / Nitrile Recommended uses:

• General purpose sealing.
• Petroleum oils and fluids.
• Gasoline
• Hydraulic fluids
• L.P. gases
• Cold Water.
• Silicone greases and oils
• Di-ester base lubricants (MIL-L-7808).
• Ethylene glycol base fluids (Hydrolubes)

Nitrile is not recommended for:

• Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene)
• Nitro hydrocarbons (nitrobenzene, aniline)
• Phosphate ester hydraulic fluids (Skydrol, Fyrquel, Pydraul).
• Ketones (MEK, acetone)
• Ozone
• Sunlight, UV
• Weather
• Strong Acids Ozone
• Automotive brake fluid

Compound Info:

• A general purpose, sulfur-cured Nitrile (Buna-N) compound
• Color: Black
• Duro: 70
• FDA: No

Operating temperature: -40° to +250°F