#21 DIN 3869 Fluid Connector / Profile Seal PR-21N85 Nitrile - M20 X 2.5 - 1/2" Fitting

Qty Discounts Prices
1-229 $0.470	230-12,999 $0.154	13,000-53,999 $0.077	54,000+ $0.046

$0.470

Model: PR21-N85
864 in Stock

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The PR-21N85 profile seal is manufactured from 85 durometer black Nitrile (NBR) and is designed for static axial sealing in M20 X 2.5 threaded hydraulic connectors per DIN 3869. Engineered for 1/2" fittings, this seal eliminates twisting during installation and provides long-lasting protection against leaks, pressure loss, and media contamination.

Ideal for use in fluid power systems utilizing mineral oil-based lubricants, this profile ring offers a significant upgrade over traditional O-Rings by maintaining its geometry under load and resisting extrusion during pressure pulsation. The PR-21N85 delivers reliable performance across mobile and industrial hydraulic applications.

#21 DIN 3869 Fluid Connector / Profile Seal – PR-21N85 Nitrile – M20 X 2.5 Fitting – 1/2" Hydraulic Thread

Operating temperature: -22° to +212°F (–30° to +100°C)

Common Applications:

Threaded hydraulic ports and fittings (M20 x 2.5)
Industrial and mobile hydraulic systems
Agricultural and construction machinery
Hydraulic cylinders, valves, and manifolds

Chemical Compatibility:

Excellent resistance to:
- Mineral oil-based lubricants
- H, HL, HLP hydraulic oils
- Water up to +80°C
Limited compatibility with:
- HFA, HFB, HFC flame-resistant hydraulic fluids (up to +60°C)
Not compatible with:
- Aromatic/chlorinated hydrocarbons
- Fuels with high aromatic content
- Glycol-based brake fluids
- Polar solvents
- HFD hydraulic fluids

Why Buy PR-21N85 from The O-Ring Store LLC?

Every PR-21N85 profile ring from The O-Ring Store LLC includes our Commercial On The Shelf (COTS) TORS Certificate of Conformance and is backed by value-added services: