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Black EPDM rubber cold shrink tube 2.25in ID 6in length

3M

3M QI-18/57-325 Cold Shrink Insulator 2.25in ID Black 6in

SKU CH-K6T1-6VHFM

Cold-shrink EPDM rubber insulator for 250–1250 MCM cables, shrinking from 2.25 in to .71 in over 6 in length

  • Color and finishBlack
  • Cold shrink installation needs no heat tools
  • EPDM rubber resists acids and alkalis
  • Fits 250 MCM to 1250 MCM cables
  • Shrinks from 2.25 in to .71 in ID
  • Operates from -40 to 194 degrees F

Product Identity

This 3M QI-18/57-325 Cold Shrink Insulator is a medium-wall EPDM rubber sleeve supplied in a 6 in length. It arrives pre-expanded on a removable core and shrinks to a 0.71 in inside diameter without heat tools. The tube is rated for 365 V dielectric strength and a -40 to 194 degrees F temperature range.

Who It Suits

Electricians and maintenance crews splicing or terminating cables from 250 MCM to 1250 MCM will appreciate the tool-free installation and acid-alkali resistance. The product is not for low-voltage data cables, high-voltage applications beyond the rated dielectric strength, or joints requiring an adhesive seal.

Deciding Specification

The 2.25 in pre-shrink inside diameter and 0.71 in recovered diameter define the cable range this insulator can seal. If the conductor bundle falls outside 250 MCM to 1250 MCM, the sleeve will not shrink to a reliable fit.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $66.99
Cheaper than about 71% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand name3M
Color and finishBlack

Questions about this item

What is the maximum continuous operating temperature for the 3M QI-18/57-325 insulator?

The insulator is rated for a maximum continuous operating temperature of 194 degrees F.

Does the EPDM rubber material generate heat or require power during all-day operation?

No, the cold shrink insulator is a passive EPDM rubber component that generates no heat and requires no power during use.

What wire size range must the cable already be within for this 2.25 in ID insulator to seal correctly?

The cable must be between 250 MCM and 1250 MCM so the insulator shrinks from 2.25 in down to 0.71 in for a proper seal.

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