O-ring Packing in NBR, 3.6 mm Thickness | Sealing Tech-G

The Sealing Tech-G NBR (Nitrile Butadiene Rubber) O-ring with a 3.6 mm thickness and 18.3 mm inner diameter is a precision O-ring for direct replacement applications in equipment requiring this specific size. The 3.6 mm thickness with a 18.3 mm ID corresponds to a common size in the JIS B 2401 standard (Japanese standard) and in equipment of Asian origin, making it a critical replacement size for maintaining imported machinery. Highly compatible with oils, fuels, lubricants, water, and numerous non-polar solvents, it is the elastomer of choice for environments with hydrocarbons. Its formulation ensures excellent abrasion and tear resistance, extending the seal's lifespan and minimizing maintenance costs.

Applications

• Direct replacement for original seals in equipment with 3.6 × 18.3 mm dimensions (JIS standard or similar)
• Japanese and Asian industrial machinery: valve, pump, and actuator seals
• Compact hydraulic and pneumatic systems: small-diameter cylinders and distributors
• Industrial instrumentation: precision seals in measurement and control equipment
• Automotive: engine and fuel system seals in Japanese and Asian vehicles
• Compact pumps and compressors: static and dynamic seals in contact with oils
• Control and regulating valves: seat and stem seals in oily fluids
• Maintenance and repair of equipment imported from Japan, Korea, and China

Technical Specifications

• Material: NBR (Nitrile Butadiene Rubber)
• Seal Thickness (CS): 3.6 mm
• Inner Diameter (ID): 18.3 mm
• Outer Diameter (OD): 25.5 mm (approx.)
• Reference Standard: JIS B 2401 / Asian standard
• Temperature Range: -30 °C to +100 °C (peaks up to +120 °C)
• Chemical Resistance: Mineral oils, fuels, lubricants, water, non-polar solvents
• Configuration: O-ring
• Sales Unit: Unit
• Country of Origin: Taiwan
• Brand: Sealing Tech-G

Chemical Compatibility

NBR is compatible with mineral oils, fuels, lubricants, water, and non-polar solvents. It is not compatible with concentrated acids, ketones, esters, ozone, or glycol-based brake fluids. For these applications, consider EPDM or VITON O-rings.

Other Common Names

This component is also known as: NBR O-ring 3.6 x 18.3 mm, JIS nitrile O-ring 18.3, round NBR gasket 18.3mm ID, JIS B2401 NBR O-ring, NBR O-ring 3.6mm CS, Japanese standard NBR O-ring, nitrile rubber O-ring JIS, O-ring replacement for Japanese equipment Honduras, 18.3 ID nitrile O-ring.