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Product image O-ring 56.87×1.78 EPDM 70 Shore A

OR-EPDM70-56-87x1-78-RB53318

O-ring 56.87×1.78 EPDM 70 Shore A

This EPDM O-ring is the correct choice for potable water, steam, brake fluids and all applications outside mineral oils.

SKU
OR-EPDM70-56-87x1-78-RB53318
Article number
53318
Dimensions
56.87 × 1.78 mm
Material
EPDM · 70 Sh A

excl. VAT

From €0.67

€0.82 incl. VAT

On demandExternal supplier

Minimum order is €5.00 excl. VAT. Below that you pay the difference as a top-up — add more pieces and you'll avoid it.

Available to order — approx. 5 days

    Certifications

    Add 9 more pieces — from 10 pcs the price is €0.60 per piece, ex. VAT.

    Need a price for a larger volume?

    EPDM O-ring 56.87 × 1.78 mm (inner diameter 56.87 mm, cross-section 1.78 mm). Outer diameter 60.43 mm. Hardness 70 Sh A. Temperature range -40 °C to 130 °C. Standard ISO3601-56.87x1.78. Certifications: WRAS, KTW.

    Inner diameter (ID)
    56.87 mm
    Cross-section (CS)
    1.78 mm
    Outer diameter (OD)
    60.43 mm
    Dimensions
    56.87x1.78
    Material
    EPDM
    Hardness
    70 Sh A
    Colour
    black
    Temperature range
    -40 °C to 130 °C
    Standard code
    ISO3601-56.87x1.78
    ISO 3601 size
    56.87x1.78
    SKU
    OR-EPDM70-56-87x1-78-RB53318
    Country of origin
    Germany
    Availability
    On demand

    Technical specifications

    Product data
    MaterialEPDM
    Hardness (Shore A)70 Sh A
    Colorblack
    CertificationsWRAS, KTW
    Indicative values for EPDM
    Temperature range-40 °C to 130 °C
    Tensile strength12 MPa
    Ultimate elongation350 %
    Compression set20 %
    Specific gravity1.15 g/cm³

    These values apply to the EPDM material family as a whole, not to this specific size and hardness. Always verify suitability for your specific application before use.

    Cross-standard size references

    Standard code
    ISO3601-56.87x1.78
    ISO 3601
    56.87x1.78
    DIN 3771
    56.87x1.78

    Material properties

    EPDM is an ethylene propylene diene rubber with excellent resistance to water, steam, polar solvents, glycol-based brake fluids, ester oils, ozone, UV radiation and weathering. Operating temperature range is -40 °C to +130 °C (sulfur-cured), peroxide-cured grade up to +150 °C and for steam. It is not resistant to mineral oils, fuels and most hydrocarbon oils. Available grades meet WRAS, KTW, DVGW, NSF 61 potable water approvals and EPDM-FDA for food contact.

    Material
    EPDM
    Chemical name
    Ethylene Propylene Diene Monomer
    Material grade
    EPM, Etylén-propylén
    Trade names
    Arlanxeo Keltan, Dow Nordel, Lion Elastomers Royalene

    Suitable for various industries

    EPDM O-rings are used in potable water systems, steam lines, HVAC installations, brake systems (DOT 3/4/5.1), solar assemblies, roofing applications and outdoor enclosures. Typical applications: water fittings, heat exchangers, automotive brake lines, pharmaceutical CIP/SIP (peroxide-cured).

    Application notes

    The only choice for potable water and glycol-based brake fluids (DOT). Not suitable for mineral oils or fuels — substituting NBR causes immediate failure. For steam use peroxide-cured grade.

    Advantages

    • Resistant to potable water and steam (peroxide-cured grade)
    • Compatible with glycol-based brake fluid
    • Excellent ozone, UV and weathering resistance
    • Operating range -40 °C to +130 °C
    • Available grades with WRAS, KTW, NSF 61 for drinking water

    Price tiers

    When buyingper piece
    from 1 pcs€0.67
    from 10 pcs −10.4%€0.60
    from 100 pcs −25.4%€0.50
    from 1000 pcs −35.8%€0.43

    Prices exclude VAT. The volume discount is applied automatically in the cart.

    Documentation

    Download datasheet (PDF)
    See all materials in size 56.87 × 1.78 mm

    Related products

    Equivalents, alternative materials, and cross-references.

    Same size — different material
    In stock

    O-ring 56.87×1.78 NBR 70 Shore A

    Dimensions
    56.87 × 1.78 mm · OD 60.43 mm
    Material
    NBR · 70 ShA

    SKU OR-NBR70-56-87x1-78-RB50526

    €0.17excl. VAT

    Same size — different material
    On demand

    O-ring 56.87×1.78 FKM 80 Shore A

    Dimensions
    56.87 × 1.78 mm · OD 60.43 mm
    Material
    FKM · 80 ShA

    SKU OR-FKM80-56-87x1-78-RB56898

    €1.00excl. VAT

    Same size — different material
    On demand

    O-ring 56.87×1.78 VMQ 70 Shore A

    Dimensions
    56.87 × 1.78 mm · OD 60.43 mm
    Material
    VMQ · 70 ShA

    SKU OR-VMQ70-56-87x1-78-RB60227

    €0.83excl. VAT

    Frequently asked questions about this O-ring

    What is the temperature range of a EPDM O-ring?
    This EPDM O-ring is rated for continuous service of roughly -40 to 130 °C. The material tolerates brief temperature peaks higher, but near the limits service life drops significantly. If you operate at the edge of the range, ask our technician about a more suitable compound.
    What media is EPDM resistant to?
    EPDM resists water, steam, brake fluids, and water-based chemicals, and has excellent resistance to ozone and weathering. It is, however, NOT compatible with mineral oils and fuels — for those, use NBR or FKM. For a specific medium, check compatibility in our chemical-resistance chart.
    What do the dimensions of this O-ring mean?
    The size 56.87 × 1.78 mm gives the inner diameter × cross section. The inner diameter must fit the groove or rod; the cross section sets the seal thickness. When replacing, do not confuse inner diameter with outer diameter. If you search by standard (AS568, ISO 3601, JIS), use our cross-reference finder.
    What does 70 Shore A hardness mean?
    A hardness of 70 Shore A expresses the stiffness of the rubber: a lower number (50–60) is softer and seals an uneven surface better, a higher one (80–90) better resists pressure and extrusion from the groove. For most common applications the optimum is around 70 Shore A. Under high pressure, choose a harder material and possibly a back-up ring.

    Read the EPDM material guide