3M QI-18/57-325 QI-18/57-325 COLD S
Product image thumbnail 0
Product image thumbnail 1
Usually ships within 8 to 12 Days
Already a Customer? Log in to view your pricing
Manufacturer 3M
Mfg Catalog # QI-18/57-325
North Coast Part # 668237


  • Specially designed for primary insulation of solid dielectric insulated wires and cable splicing rated to 1000 volts
  • 3M™ Cold Shrink Quick Insulator QI Series are open-ended tubular rubber sleeves with sealing mastic on each end that are factory expanded and assembled onto a removable core. The core is removed by pulling from one end after the QI insulator has been positioned over an inline connector, allowing the ends of the tube to shrink and form a water-resistant seal. Sizing of the core and tube, along with the sealing mastic on each end, provides a broader application range without degrading the seal and insulating characteristics of the EPDM rubber tube. Five diameter sizes will cover a range of 1 kV or less cable from 8 AWG–3000 kcmil, copper and aluminum conductors with crimped connectors.
  • Simple installation which requires no tools
  • Offers excellent wet electrical properties and resists water, acids and alkalis
  • Made of EPDM rubber which contains no chlorides or sulfur
  • Withstands temperatures of -40 to 194 degrees F (-40 to 90 degrees C)
  • Environmental sealing for communication and other non-electrical applications

Legal Disclaimer

  • 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.
  • 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.


  • 3M ID: 80611443518
  • Application: Cable Connection
  • Brand: 3M™
  • Cable Shielding: Non-shielded
  • Cable Type: Power Cable
  • Case Quantity: 10
  • Color Family: Black
  • Conductor Material: Aluminum || Copper
  • Conductor Size Range: 250–1250 kcmil (Cu), 250–1250 kcmil (Al)
  • Conductor Sizes: 1000 kcmil || 1250 kcmil || 250 kcmil || 300 kcmil || 350 kcmil || 400 kcmil || 500 kcmil || 600 kcmil || 650 kcmil || 700 kcmil || 750 kcmil || 800 kcmil || 900 kcmil
  • Connector Included: No || None
  • Dielectric Strength (V/mil): 365 V/mil
  • Elongation: 750 %
  • Indoor/Outdoor: Both
  • Inner Diameter After Shrink (Imperial): 0.71 in
  • Inner Diameter After Shrink (Metric): 18 mm
  • Inner Diameter Before Shrink (Imperial): 2.25 in
  • Inner Diameter Before Shrink (Metric): 57.2 mm
  • Insulation O.D. Range: 0.71-2.25 in
  • Insulation O.D. Range (Metric): 18.0-57.2 mm
  • Insulation Outside Diameter Range: 1.04 - 1.70 Inch
  • Insulation Outside Diameter Range (Metric): 26.4 - 43.2 mm
  • Manufacturing Origin: USA
  • Material: EPDM Rubber
  • Maximum Connector Length: 6.00 in
  • Maximum Connector Length (Metric): 152.4 mm
  • Maximum Connector O.D.: 2.25 in
  • Maximum Connector O.D. (Metric): 57.2 mm
  • Maximum Operating Temperature (Celsius): 90 Degree Celsius
  • Maximum Operating Temperature (Fahrenheit): 194 Degree Fahrenheit
  • Maximum Wire Gauge: 325mm²
  • Minimum Operating Temperature (Fahrenheit): -40 Degree Fahrenheit
  • Minimum Wire Gauge: 185mm²
  • Number of Conductors: 1
  • Product Color: Black
  • Product Type: Splice
  • Typical Splice Length: 32 in
  • Typical Splice Length (Metric): 813 mm
  • Voltage: 1 kV
  • Voltage Application: Medium Voltage


UPC 05112857751
GTiN 00051128577516
Size 1000 kcmil; 1250 kcmil; 250 kcmil; 300 kcmil; 350 kcmil; 400 kcmil; 500 kcmil; 600 kcmil; 650 kcmil; 700 kcmil; 750 kcmil; 800 kcmil; 900 kcmil
Type Cold Shrink Splice
Family Brand Name 3M
Voltage 1 kV
Conductor Size 700 MCM
Color Black
Max Operating Temperature 194 degrees F

Your Product Lists

Log In or register for an account to gain access to the product groups feature!

You can create lists of products for regular needs, special projects, even use one as a wishlist.

Your Part Numbers

Log In or register for an account to assign your company part numbers to products!

No more memorizing or cross-referencing! Map your company's internal part numbers to items, then use your part numbers for searching and ordering.