McMaster-Carr logo
    Filter by
    System of Measurement
    Width
    Attribute Image
    Cross Section Shape
    Fractional Width
    Hardness Rating
    Industrial Info Compare
    Fractional ID
    Specifications Met
    Fractional OD
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Food Industry Standard
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    6 Products
    About O-Rings
    industrial info icon

    Find the right size, compare compatible materials, and choose the best cross section shape for your O-ring.

    Oil-Resistant Buna-N O-Rings

    Made of Buna-N, these O-rings resist grease, hydraulic oil, and motor oil—plus mild chemicals and water. However, Buna-N is not for use with brake fluid. These O-rings are commonly used to create multidirectional seals between two parts in power transmission assemblies, hydraulic cylinders, and pneumatic cylinders. They resist compression and tearing to keep their shape over time. All have shelf life, a cure date, and a traceable lot number printed on the package.
    Inch
    Image of Product. Front orientation. O-Rings. Oil-Resistant Buna-N O-Rings.
    Image of Attribute. Front orientation. CrossSection view. Contains Annotated. O-Rings. Oil-Resistant Buna-N O-Rings.
    Fractional
    Pkg.
    Dash
    No.
    ID
    OD
    ID
    OD
    Hardness
    Specs. Met
    Temp. Range,
    ° F
    Color
    Pkg.
    Qty.
    1-9
    10-49
    50-Up
    1/16 Fractional Width (0.07" Wide)
    054
    		6 1/46 3/86.239"6.379"Durometer 70A (Medium)ASTM D2000, SAE AS568, SAE J200-30 to 215Black29452K304000000000000000
     

    High-Temperature Parker S1138 Silicone O-Rings

    Image of Product. Bottom orientation. O-Rings. High-Temperature Parker S1138 Silicone O-Rings.
    Image of Attribute. Front orientation. CrossSection view. Contains Annotated. O-Rings. High-Temperature Parker S1138 Silicone O-Rings.
    Use these O-rings in temperatures up to 400° F. Made of Parker S1138 silicone, they’re pure enough for food or pharmaceutical applications—they’re USP VI certified. These O-rings are also FDA compliant for direct contact with food. All come with a cure date and a traceable lot number printed on the bag.
    Fractional
    Pkg.
    Dash
    No.
    ID
    OD
    ID
    OD
    Hardness
    Specs. Met
    Food Industry Std.
    USP
    Class
    Temp. Range,
    ° F
    Color
    Pkg.
    Qty.
    1-9
    10-49
    50-Up
    1/16 Fractional Width (0.07" Wide)
    054
    		6 1/46 3/86.239"6.379"Durometer 70A (Medium)ASTM D2000, SAE J200FDA Compliant 21 CFR 177.2600
    		VI-60 to 400Red19396K944000000000000000
     

    Water- and Steam-Resistant EPDM O-Rings

    Made of EPDM, these O-rings have excellent resistance to water, steam, and glycol-based fluids, including brake fluid. They’re often used to seal plumbing and refrigeration systems, since they won’t swell or break down in moist environments. All have shelf life, a cure date, and a traceable lot number printed on the bag.
    Inch
    Image of Product. Front orientation. O-Rings. Water- and Steam-Resistant EPDM O-Rings.
    Image of Attribute. Front orientation. CrossSection view. Contains Annotated. O-Rings. Water- and Steam-Resistant EPDM O-Rings.
    Fractional
    Pkg.
    Dash
    No.
    ID
    OD
    ID
    OD
    Hardness
    Specs. Met
    Temp. Range,
    ° F
    Color
    Pkg.
    Qty.
    1-9
    10-49
    50-Up
    1/16 Fractional Width (0.07" Wide)
    054
    		6 1/46 3/86.239"6.379"Durometer 70A (Medium)ASTM D2000, SAE AS568, SAE J200-65 to 300Black58785N114000000000000000
     

    High-Temperature Soft Silicone O-Rings

    Easier to compress than standard silicone O-rings, these O-rings create a better seal in enclosures, reservoirs, and other low-pressure equipment. They can withstand temperatures up to 400° F. All have shelf life, a cure date, and a traceable lot number printed on the bag.
    Inch
    Image of Product. Front orientation. O-Rings. High-Temperature Soft Silicone O-Rings.
    Image of Attribute. Front orientation. CrossSection view. Contains Annotated. O-Rings. High-Temperature Soft Silicone O-Rings.
    Fractional
    Pkg.
    Dash
    No.
    ID
    OD
    ID
    OD
    Hardness
    Specs. Met
    Temp. Range,
    ° F
    Color
    Pkg.
    Qty.
    1-9
    10-Up
    1/16 Fractional Width (0.07" Wide)
    054
    		6 1/46 3/86.239"6.379"Durometer 50A (Soft)ASTM D2000, SAE AS568-65 to 435Red11173N340000000000
     

    High-Temperature Silicone O-Rings

    Made of silicone, these O-rings can withstand temperatures up to 400° F or higher. They're FDA compliant for direct contact with food, so they're often used on hot food lines. They're also used to seal HVAC systems. All come with a cure date and a traceable lot number printed on the bag.
    Inch
    Image of Product. Bottom orientation. O-Rings. High-Temperature Silicone O-Rings.
    Image of Attribute. Front orientation. CrossSection view. Contains Annotated. O-Rings. High-Temperature Silicone O-Rings.
    Fractional
    Pkg.
    Dash
    No.
    ID
    OD
    ID
    OD
    Hardness
    Specs. Met
    Food Industry Std.
    Temp. Range,
    ° F
    Color
    Pkg.
    Qty.
    1-9
    10-49
    50-Up
    1/16 Fractional Width (0.07" Wide)
    054
    		6 1/46 3/86.239"6.379"Durometer 70A (Medium)ASTM D2000, SAE AS568, SAE J200FDA Compliant 21 CFR 177.2600
    		-65 to 400Red29186N165000000000000000
     

    Chemical-Resistant Viton® Fluoroelastomer O-Rings

    Made of Viton® fluoroelastomer, these O-rings combine the oil resistance of Buna-N with the heat tolerance of silicone. They also resist a variety of chemicals, including benzene, butyl alcohol, and ethylene glycol. They’re often used to seal hydraulic systems and equipment in crude oil refineries. All have shelf life, a cure date, and a traceable lot number printed on the bag.
    Inch
    Image of Product. Front orientation. O-Rings. Chemical-Resistant Viton® Fluoroelastomer O-Rings.
    Image of Attribute. Front orientation. CrossSection view. Contains Annotated. O-Rings. Chemical-Resistant Viton® Fluoroelastomer O-Rings.
    Brown—Brown O-rings help you tell Viton® fluoroelastomer apart from other materials.
    Fractional
    Pkg.
    Dash
    No.
    ID
    OD
    ID
    OD
    Hardness
    Specs. Met
    Temp. Range,
    ° F
    Choose a
    Color
    Pkg.
    Qty.
    1-9
    10-49
    50-Up
    1/16 Fractional Width (0.07" Wide)
    054
    		6 1/46 3/86.239"6.379"Durometer 75A (Medium)ASTM D2000, SAE AS568, SAE J2000 to 400Black, Brown19464K798000000000000000
     
    back to top