3M 7000058840 Butt Splice Terminal Heat Shrink Nylon Blue 25pk

Product Description

The 3M 7000058840 is a fully insulated butt splice terminal designed for making secure inline wire connections in electrical wiring harnesses, control panels, and field wiring applications. The heat shrink nylon insulation provides a durable, moisture-resistant sleeve that protects the crimped connection after installation. The crimp-on connection method eliminates the need for soldering and delivers a consistent, low-resistance joint. Each package contains 25 terminals. The blue color coding indicates the wire gauge range this terminal is rated for, allowing technicians to quickly select the correct splice during installation.

This butt splice terminal is suited for residential and light commercial electrical work, HVAC control wiring, panel wiring, and equipment repair where inline wire splicing is required. The fully insulated design makes it appropriate for use in environments where exposed conductors could create a shock or short-circuit hazard. Electricians, HVAC technicians, and panel builders commonly use this terminal type when extending or repairing wire runs inside equipment enclosures or junction boxes.

Key Features

• Fully insulated construction with heat shrink nylon sleeve for moisture and abrasion resistance
• Crimp-on connection for fast, solder-free installation
• Blue color coding for quick wire gauge identification at the workbench
• Accepts two wire entries for standard inline splicing
• Sold in a 25-count package — suitable for service calls and small jobs

Compatibility

Designed as an OEM-style replacement and general-use butt splice terminal compatible with standard crimp tooling used for insulated terminals in electrical and HVAC wiring applications.

Installation Notes

Installation should be performed by a qualified electrician or HVAC technician in accordance with NEC requirements for the application. De-energize and lock out the circuit before making any wire connections. Use a ratcheting crimp tool rated for insulated terminals to ensure a full, consistent crimp. After crimping, apply heat evenly to the heat shrink sleeve with a heat gun until the insulation shrinks fully around the wire and terminal barrel.