3M™ Cold Shrink Silicone Insulators 8440 Series
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Highlights
- DESIGNED TO PERFORM: Offers reliable primary insulation for solid dielectric wires and secondary splices rated up to 1000 volts
- HIGH-DURABILITY: Provides exceptional thermal stability against UV radiation, moisture, acids, alkalis, and is also fire resistant
- EASY TO INSTALL: Requires no tools or heating sources and can be installed by hand
- BUILT STRONG: Made of silicone rubber, enduring operating temperatures ranging from -66 °F to 500 °F (-55 °C to 260 °C)
- MULTIPURPOSE: For electrical aircraft cables, cable trays or overhead applications, sheath repairs, and secondary splices for both copper and aluminum conductor
- WORK YOUR WAY: Accommodates an application range of 0.35 in (8.86 mm) to 0.95 in (24.13 mm) for installations on 6 AWG to 3/0 AWG
- LONG-LASTING: Maintains thermal stability, resiliency, and pressure for dependable performance
3M™ Cold Shrink Connector Insulators 8440 Series are open-ended, factory-expanded silicone rubber tubes designed with cold shrink technology and loaded on a removable plastic core. To install the connection, position it over the inline connector, pull the loose tab on the plastic core while unwinding the core in a counterclockwise direction, allowing the ends of the tube to shrink and form a secure seal. Engineered for primary insulation of solid dielectric insulated wires and cable splices rated up to 1000 volts, the insulators can be used for indoor and outdoor applications to provide a moisture-resistant seal. They are easy to install by hand, requiring no additional tools or heating sources. Accommodating an application range of 0.35 in (8.86 mm) to 0.95 in (24.13 mm) for installations on 6 AWG to 3/0 AWG, 3M™ Cold Shrink Connector Insulators 8440 Series provide physical protection and environmental sealing for terminal lug barrels and inline connectors. These insulators are ideal for electrical aircraft cables, cable trays or overhead applications, sheath repairs, and secondary splices for both copper and aluminum conductors. They can withstand an operating temperature range between -66 °F to 500 °F (-55 °C to 260 °C). With reliable thermal stability, high chemical resistance, fire resistance, and a secure moisture seal, 3M™ Cold Shrink Connector Insulators 8440 Series is your answer to dependable insulating performance.
3M has over 40 years of lab-tested and industry-proven results with the reliability of cold shrink technology. 3M™ Cold Shrink Connector Insulators 8440 Series and the other products in the cold shrink family are engineered with specifically formulated materials that deliver a durable environmental seal and insulation. The cold shrink product portfolio is a complete line of components and accessories that deliver solutions to customers worldwide. In this advanced solution, the formulation of silicone rubber provides increased reliability to the impact of UV, fluid splashes, acids, and alkalis, as well as offering excellent hydrophobic properties. Additionally, silicone construction offers high flexibility at low ambient temperatures and excellent mechanical and dielectric behavior.
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Current product  3M™ Cold Shrink Silicone Insulators 8440 Series | ||||
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| Conductor Sizes (Imperial) | 1 AWG, 2 AWG, 4 AWG, 6 AWG, 1/0 AWG, 2/0 AWG, 3/0 AWG | |||
| Inner Diameter After Shrink (Imperial) | 0.299 in, 0.37 in, 0.488 in | |||
| Inner Diameter Before Shrink (Imperial) | 0.559 in, 0.72 in, 0.949 in | |||
| Overall Length (Imperial) | 2.5 in, 6.5 in, 8 in | |||
| Inner Diameter After Shrink (Metric) | 7.6 mm, 9.4 mm, 12.4 mm | |||
| Inner Diameter Before Shrink (Metric) | 14.2 mm, 18.3 mm, 24.1 mm |
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3M™ Cold Shrink Connector Insulators 8420 and 8430 SeriesLegal 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.
For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage. For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
