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3M 8426-11 Cold Shrink Connector Insulators

Manufacturer: 3M | Catalog # 8426-11 | Irby Part # 22824

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Usually ships within 16 to 26 days
Quick and easy installation, no special tools and no heat requiredSeals tight, retains resiliency and pressureAccommodates a wide range of cable sizesResists acids, alkalis and ozoneNo mastic or tape required to seal

Technical Information

For Power Cables
Cable Type
Power Cable
Conductor Size
2/0 AWG, 250 MCM, 3/0 AWG, 4/0 AWG
Max Operating Temperature
194 degrees F
Number of Conductors
Shrink Ratio
2/0 AWG; 250 kcmil; 3/0 AWG; 4/0 AWG
Splice Type
Cold Shrink
Temperature Rating
0 - 80 C
Thick Wall
1 kV
Wall Thickness
4.06 mm

Manufacturer Information

Family Brand Name

General Product Info

Product Type
Product UPC
Used With
Aluminum, Copper Conductors


11 Inch
Overall Length
11 in
  • Manufacturing Origin: USA
  • Note: 3M products offered on a government contract that require country of origin representation must be certified by 3M Trade Compliance. Contact customer service at 800-245-3573 to request a certificate.
  • The designation that a product is Manufactured in the USA means the product undergoes substantial transformation in one of our U.S. Manufacturing plants. Some products contain imported components.
  • 3M™ 8420 Cold Shrink Connector Insulator is an open-ended, tubular sleeve that provides ozone, acids and alkalis resistance. This environmental sealing insulator offers primary electrical insulation for 1 kV-rated applications. The tough, durable, EPDM rubber construction makes the insulator withstand operating temperatures of -40 to 194 degrees F (-40 to 90 degrees C).
  • Accommodates 2/0 AWG to 250 kcmil conductor sizes
  • Withstands temperatures of -40 to 194 degrees F (-40 to 90 degrees C)
  • Suitable for insulating secondary splices, direct-buried or submersible and dig-in repairs
  • Insulates cable or connectors within a diameter range of 0.55 - 1.18 in (13,9 - 30,1 mm)
  • Simple installation which requires no tools
  • Made of EPDM rubber which contains no chlorides or sulfur
  • Specially designed for primary insulation of solid dielectric insulated wires and cable splicing rated to 1000 volts
  • ANSI Certified and RoHS 2011/65/EU Compliant
  • Environmental sealing for communication and other non-electrical applications
  • 10/case
  • 3M™ 8420 Connector Insulator is designed for use on all solid dielectric insulated wires and cable splices. This cold shrink insulator offers moisture-tight sealing while maintaining its prolonged resiliency and pressure. It is ideal for insulating secondary splices, direct-buried or submersible, dig-in repairs and physical protection of high-voltage, air-insulated connectors or lugs. ANSI Certified and RoHS 2011/65/EU Compliant.