E70237

237 O-RING EPDM
70 DURO PEROXIDE-CURED BLACK
CS: .139″ (3.53MM)
ID: 3.359″ (85.32MM)

E70237

Quantity Pricing (ea)
  • 1 for $0.93
  • 80 for $0.83
  • 400 for $0.74
  • 800 for $0.65
  • 1600 for $0.56
Stock & Availability (ea)
In Stock: 891
Inbound Stock: 6,650
Qty Available
3,250 06/29/2026
3,400 08/03/2026
Offsite Stock: 0 ($50 Line Min)
New Production: Unlimited ($250 Line Min)
Expedited Shipping*: 08/12/2026
Standard Shipping: 11/02/2026
*Add your desired qty and click ADD TO CART to see expedite fees and options.

Interchange Part Numbers

  • MCMASTER-CARR 9557K81

Additional information

Weight 0.00692 lbs
Shipping Dimensions 3.637 × 3.637 × 0.139 in
Material

Color

Size

237
Durometer

Minimum Temperature -67
Maximum Temperature 257

Description

Product Drawing: E70237.pdf

SPEC SHEET: Ethylene Propylene Rubber (EPR, EPDM) 70 Durometer.pdf

Ethylene Propylene Rubber (EPR, EPDM)

Material Description

Ethylene Propylene Rubber (EPDM) is a Copolymer of ethylene and propylene. Furthermore, it is a terpolymer of ethylene and propylene with a small amount of a third monomer (usually a diolefin) to permit vulcanization with sulfur. Generally, EPDM possesses an excellent resistance to ozone, sunlight and weathering, and has very good flexibility at low temperature, good chemical resistance (many dilute acids and alkalis as well as polar solvents) and good electrical insulation property.

Cure system: Peroxide-cured

Standard EPDMs are usually sulfur-cured. Sulfur-cured compounds offer better flexible properties but are more prone to hardening and have an inferior compression set with high temperature. Peroxide-cured EPDMs have better heat resistance and a lower compression set. It complies with long-time usage, especially for hose systems in the construction industry, but is more expensive and more difficult for production than the sulfur-cured EPDMs.

Temperature Range:

Standard Low Temp: -55°C (-67°F)

Standard High Temp: 125°C (257°F)