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Black rubber cold-shrink tube 1.38 in before shrink 6 in long

3M

3M 8427-6 Cold Shrink Tube 1.38 in 6 in

SKU CH-9ZAA-DSP7P

Cold-shrink EPDM rubber tube fits 250–400 MCM cable, shrinking from 1.38 in to .67 in ID over a 6 in length

  • Color familyBlack
  • Product typeCable Management & Conduit
  • Cold shrink installs without heat tools
  • EPDM rubber resists UV and weathering
  • Fits 250 to 400 MCM wire sizes
  • Shrinks from 1.38 in to .67 in ID
  • Operates from -40 to 194 degrees F

Cold Shrink Insulator for 250 to 400 MCM Cable

The 3M 8427-6 tube fits wire sizes from 250 MCM to 400 MCM. Made from EPDM rubber, it installs without heat tools and shrinks to an inside diameter of 0.67 in. The six-inch length provides coverage for splices or terminations in automotive and industrial wiring jobs.

Check Cable Diameter and Voltage Rating

Verify that your conductor falls within the 250 to 400 MCM range before ordering. The tube shrinks from 1.38 in to 0.67 in, so the cable must be smaller than the pre-shrink diameter. Dielectric strength is rated at 1,000 V and the operating temperature spans -40 to 194 degrees F.

Replaces Heat-Shrink Methods on Medium-Wall

This cold-shrink tube removes the need for a torch or heat gun on medium-wall insulation tasks. The jump is worth it when flame-retardant requirements are absent and UV-resistant EPDM rubber suits the environment. It is not for buyers who need adhesive-lined seals or a rated shrink ratio.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $214.99
Pricier than about 91% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand name3M
Color familyBlack
Product typeCable Management & Conduit

Questions about this item

What comes in the package and do I need any extra tools to install it?

Each package contains individual pieces of the 8427-6 cold shrink tube. No heat gun, torch or adhesive is required because the tube shrinks onto the cable by removing its internal support core.

How do I choose the right tube for my cable size?

Select this tube when your conductor falls between 250 MCM and 400 MCM. The tube arrives at 1.38 in inside diameter and shrinks down to .67 in to fit that range.

What does the 1,000 V dielectric strength mean for my installation?

It means the EPDM rubber wall can withstand up to 1,000 volts without breaking down, so the tube is suitable for low-voltage splices and terminations within that limit.

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