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  • Lip Seal, Square Profile, Buna-N O-Ring Loaded, Urethane
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Lip Seal, Square Profile, Buna-N O-Ring Loaded, Urethane

Available in multiple versions

1 customer review

Price: $2.60 - $16.94
Product Specifications
Brand Name Small Parts
Material Type Urethane
System of Measurement Inch
Color Black
Cross Section Shape square
Hardness 92 A Durometer
LowerTemperature Range -40  Degrees Fahrenheit
Maximum Pressure 5000  PSI
Shape Square
UNSPSC Code 31411705
Upper Temperature Range 200  Degrees Fahrenheit

This loaded lip seal has a square profile, is made of black urethane, has a black Buna-nitrile... Read full product description



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1 B005M2NGS4
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1 B005M2OWIW
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1 B005M2OX4U
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1 B005M2OYGC
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1 B005M2OYXU
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1 B005M2OZPC
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1 B005M2P0QA
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$6.25
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1 B005M2P1FA
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1 B005M2P1WS
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1 B005M2P31W
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$6.01
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1 B005M2P3GC
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1 B005M2P3XK
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1 B005M2P4D4
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$2.60
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1 B005M2P4P2
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1 B005M2P51U
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1 B005M2P5DS
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$7.70
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1 B005M2P5OC
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1 B005M2P67S
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1 B005M2P6TG
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Product Features

  • Loaded lip seal for providing a hydraulic-cylinder seal under pressures up to 5,000 pounds per square inch (psi)
  • Square profile to provide a static seal
  • Lip seal made from urethane for flexibility and resistance to impact, abrasion, and hydrocarbons
  • O-ring made of Buna-nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons
  • Functions in temperatures from - 40 to 200 degrees F and has a durometer of 92A

Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B005M4T2HG
  • Average Customer Review: 5.0 out of 5 stars  See all reviews (1 customer review)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Product Description

This loaded lip seal has a square profile, is made of black urethane, has a black Buna-nitrile (Buna-N) O-ring, provides a seal under pressures up to 5,000 pounds per square inch (psi), functions in temperatures from – 40 to 200 degrees F and has a durometer of 92A.

Urethane is a lightweight plastic with impact, abrasion, weather, electrical, and hydrocarbon resistance. It is available in different levels of hardness depending on the application, and performs well up to about 90 degrees C (194 F). Buna-nitrile can have high tensile strength, and has abrasion, tear, and compression set resistance. It is compatible for use with petroleum, hexafluoroacetone (HFA), hexafluoro-2-butyne (HFB) and hydrofluorocarbon (HFC) fluids, vegetable oil, alcohol, acids, and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering, and should not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.

The durometer hardness of this lip seal is 92A. Durometers measure the hardness of a material and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation. On a scale of 0 to 100, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for softer plastics, while shore D is used for harder plastics.

Square profile lip seals, also known as polypacks, provide a pressure and fluid seal for rod and piston seals in low pressure hydraulic applications. They are circular in shape, with a square cross section for providing a static seal under high pressure, and a u-shaped indentation for holding an O-ring (which helps alleviate pressure on the inner and outer diameter seal surface and to prevent leakage in dynamic applications at lower pressures). O-rings provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. Lip seals are available in different heights, widths, and with different inside and outer diameters


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Most Helpful Customer Reviews

By Bruce's Reviews on June 24, 2014
Number of Items: 1
This one works. Forget the rounded O'ring for your new dash oil pressure gauges. You really need this little flat seal if you are going to seal the oil sandwich adapter.
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