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Blue heat-shrink butt splice connector, 1.3 in long, 250 pack

3M

3M MH14BCK Butt Splice Connector 14 AWG Blue Heat Shrink

SKU CH-T2BR-FYEVC

Heat-shrink butt splice for 16–14 AWG wire, 600 V rated, CSA and UL listed, 250 per pack

  • TypeElectrical Connectors
  • Heat-shrink insulation seals out moisture and corrosion
  • Crimp barrel accepts 16–14 AWG copper wire
  • UL listed and CSA certified for 600 V service
  • Butted seam design resists pull-out under vibration
  • 250-piece bulk pack keeps large jobs supplied

Wire Range & Use

This 3M butt splice connector accepts solid or stranded copper wire from 16 AWG up to 14 AWG. The blue insulation colour identifies the wire range at a glance. It suits automotive, marine and general electrical repairs where a sealed, insulated joint is required. The pack contains 250 pieces for volume work.

Crimp & Seal Design

A butted-seam copper barrel receives the stripped conductors before crimping. After the crimp, applied heat shrinks the insulation tubing around the joint, creating a moisture-resistant seal. The connector carries CSA certification, UL listing and complies with RoHS 2011/65/EU. Overall length is 1.3 in and barrel inside diameter is .095 in.

Ratings & Limits

Maximum operating temperature is 221 degrees F and the voltage rating is 600 V. These limits define the safe envelope for continuous service. The heat-shrink sleeve adds environmental protection but does not change the electrical ratings. Installers must match wire gauge and crimp tool to the specified range.

Highlights

  • Heat-shrink insulation seals out moisture and corrosion
  • Crimp barrel accepts 16–14 AWG copper wire
  • UL listed and CSA certified for 600 V service
  • Butted seam design resists pull-out under vibration
  • 250-piece bulk pack keeps large jobs supplied

Specifications

Brand3M
TypeElectrical Connectors

Questions about this item

What wire-gauge range does the blue heat-shrink butt splice accept?

It is rated for 16 AWG minimum and 14 AWG maximum wire sizes.

What barrel diameter and overall length must the crimp tool accommodate?

The barrel inside diameter is 0.095 in and the overall length is 1.3 in.

How is the heat-shrink insulation activated after crimping, and what temperature rating should the heat source meet?

Apply heat until the tubing shrinks and adhesive flows; the connector is rated to 221 Degrees F maximum operating temperature.

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