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Blue nylon butt splice connectors, pack of 100

3M

3M MNG14BCX Butt Splice Connector 16-14 AWG Pack of 100

SKU CH-DNQJ-BGNBR

Connects 16-14 AWG wires with seamless tin-plated copper barrels, nylon insulation rated to 221°F and 600 V, CSA certified and UL listed, pack of 100

  • TypeElectrical Connectors
  • Connects 16–14 AWG wires securely
  • Seamless crimp barrel resists pull-out
  • Nylon insulation withstands 221 °F heat
  • CSA and UL listed for 600 V circuits
  • Pack of 100 connectors for volume jobs

Application & Wire Range

These 3M butt splice connectors join 16 to 14 AWG copper conductors using a crimp termination. The seamless tin-plated brass barrel measures 0.09 inches inside diameter and one inch overall. Blue nylon insulation is rated for 600 volts and 221 degrees Fahrenheit. The pack contains 100 pieces certified to UL and CSA standards.

Suitability & Limits

Electricians and technicians making inline splices in automotive, marine or industrial control wiring will find the crimp style and temperature rating appropriate. The connectors are not suited for solid conductors outside the 16-14 AWG window, for voltages above 600 V, or for environments exceeding 221 °F. Users needing insulated-displacement or solder-style terminations should consider other designs.

Deciding Specification

The critical parameter is the 16-14 AWG wire-range combined with the seamless crimp barrel. If the conductors fall within this gauge and a crimp tool is available, the connector will meet the listed 600 V and 221 °F ratings. If the wire is larger, smaller, or a different termination method is required, this part will not fit the application.

Highlights

  • Connects 16–14 AWG wires securely
  • Seamless crimp barrel resists pull-out
  • Nylon insulation withstands 221 °F heat
  • CSA and UL listed for 600 V circuits
  • Pack of 100 connectors for volume jobs

Specifications

TypeElectrical Connectors
Brand3M

Questions about this item

What wire gauges must I already have on hand for these blue nylon-insulated butt splices to accept a crimp?

The connectors are rated for 16 to 14 AWG solid or stranded copper wire.

Can the 600 V, 221 °F rated splices share a harness with older lower-temperature insulation?

Yes, the nylon insulation meets the same 600 V and 221 °F limits, so it will not degrade faster than legacy wiring at those ratings.

After crimping, how can I confirm the tin-plated copper barrel made a gas-tight joint?

Perform a pull-test — a properly crimped 16-14 AWG joint should hold the wire firmly without the conductor slipping out of the 0.09 in barrel.

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