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The 3M 7000031843 is a fully insulated, heat shrink nylon butt splice terminal designed for making secure inline wire connections in electrical wiring applications. The crimp-on connection method delivers a reliable mechanical bond without requiring solder, making it a practical choice for field repairs and panel wiring. At 1.5 inches overall length, the terminal accepts two wire entries and is color-coded yellow for quick gauge identification on the job. Licensed electricians and experienced electrical tradespeople install these terminals using standard crimping tools.
This butt splice terminal is suited for residential, commercial, and light industrial electrical work where inline wire splicing is required. The heat shrink nylon insulation provides both mechanical protection and environmental resistance after activation, making it appropriate for applications where the splice may be exposed to moisture or abrasion. Each package contains 25 terminals, supporting production wiring runs or stocking for service calls.
Designed as an OEM-style inline splice terminal for use in standard crimp-on electrical wiring applications where a fully insulated, heat shrink butt splice is required.
Installation is typically performed by a licensed electrician or qualified electrical technician. De-energize all circuits before making any splice connections and verify the circuit is locked out per applicable NEC requirements. Use a calibrated ratcheting crimping tool matched to the terminal's wire gauge range to ensure a proper mechanical crimp. After crimping, apply heat evenly to the nylon sleeve using a heat gun until the insulation shrinks fully and conforms to the wire jacket.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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