3M 7000133426 Closed End Wire Connector Vinyl Insulated

Product Description

The 3M 7000133426 is a vinyl-insulated closed end wire connector sold in a bottle of 50 pieces under the S-31-A product designation. Closed end connectors terminate two or more conductors by crimping them together inside an insulated cap, creating a secure, insulated splice without the need for an open barrel or wire nut twist. The vinyl insulation protects the terminated joint from incidental contact and moisture ingress in low-voltage wiring applications. Electricians and low-voltage technicians use these connectors for quick, reliable terminations in control wiring, thermostat circuits, and similar light-gauge wire work.

These connectors are suited for residential and light commercial electrical and low-voltage control wiring applications. Typical installation scenarios include splicing thermostat wire, alarm system conductors, and other light-gauge signal or control circuit wiring. The bottle-pack format of 50 pieces is practical for service technicians who carry connector assortments on service vehicles or in field kits. They are installed using a standard crimping tool appropriate for the conductor gauge range of the S-31-A series.

Key Features

• Closed end design fully encapsulates and insulates the crimped splice
• Vinyl insulation provides electrical isolation and basic moisture resistance
• S-31-A series designation for consistent gauge-range identification
• Packaged 50 connectors per bottle for efficient field use
• Crimp-style termination eliminates the need for tape or wire nuts on end splices

Compatibility

Designed as an OEM-style closed end connector for use in light-gauge control and signal wiring terminations typical of residential and light commercial electrical applications.

Installation Notes

Installation is performed by licensed electricians or qualified low-voltage technicians following applicable NEC requirements for the circuit type being terminated. De-energize and lock out the circuit before stripping conductors and inserting them into the connector. Use a crimping tool rated for the connector series to achieve a proper mechanical and electrical connection. Do not over-insert conductors beyond the connector stop, and verify the insulation sleeve fully covers the terminated joint after crimping.

Technical Specifications

• Insulation Material: Vinyl
• Connector Style: Closed End
• Series: S-31-A
• Package Quantity: 50 per bottle
• Unit of Measure: Each
• Weight: 0.01 pounds
• UPC: 00051128589960

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000133426