Supco t1057c Closed End Connector 100 Pack

Product Description

The SUPCO t1057c is a closed end connector sold in a 100-piece pack, designed for making secure, insulated wire terminations in electrical and HVAC service applications. Closed end connectors crimp onto the ends of wire bundles to create a clean, protected connection without requiring a junction box or additional insulation tape. This terminal is rated for a maximum voltage of 600 volts and a maximum temperature of 221 degrees F (105 degrees C), making it suitable for a wide range of low- and line-voltage wiring tasks. Electricians, HVAC technicians, and service professionals keep these on hand for quick, reliable field connections.

The t1057c is well-suited for residential and light commercial electrical and HVAC service work where wire splicing or termination is required. The 100-piece quantity makes this pack practical for repeat service calls and small-to-medium jobs where having a ready supply of connectors reduces downtime. Typical applications include thermostat wiring, control circuit connections, and general low-voltage wire bundling in equipment panels or junction points.

Key Features

• Rated for up to 600 volts, suitable for both low-voltage control circuits and line-voltage applications
• Maximum temperature rating of 221 degrees F (105 degrees C) for use in warm equipment environments
• Closed end design provides insulated, crimp-style termination without additional taping
• 100-piece pack supports multiple service calls and reduces supply runs
• Compact form factor fits standard crimping tool workflows

Compatibility

Designed as a general-purpose closed end connector for use in residential and light commercial electrical and HVAC wiring applications where insulated crimp terminations are required.

Installation Notes

Installation should be performed by a licensed electrician or qualified HVAC technician. De-energize and lock out the circuit before making any wire connections. Use a properly sized ratchet crimping tool to achieve a secure, gas-tight crimp. Follow applicable NEC guidelines for wire gauge compatibility and connector selection.

Technical Specifications

• Max Voltage: 600 volts
• Max Temperature: 221 degrees F (105 degrees C)
• Quantity: 100 pieces per pack

Standard Information

• Brand: SUPCO
• Manufacturer Part Number: t1057c