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Twenty gold insulated spade terminals with red and black covers

The Wires Zone

The Wires Zone TWZ-ST4-20 4 gauge 5/16" insulated spade terminals 20 pack

SKU CH-HZ2Y-Y56BE MPN TWZ-ST4-20

Pack of 20 gold-finish 4-gauge 5/16" insulated spade terminals with colour-coded covers

  • Product typeCable Terminals & Clips
  • Gold finish resists corrosion for lasting conductivity
  • 4 gauge 5/16" insulated spade fits thick power cables
  • Twenty terminals cover multiple amplifier connections
  • Five red and five black covers simplify polarity identification
  • Insulated design protects against accidental shorts

4-gauge spade terminals for amplifier wiring

The Wires Zone TWZ-ST4-20 pack contains twenty insulated spade terminals sized for 4-gauge cable with a 5/16 inch stud hole. They are intended for installers connecting power or speaker leads to amplifiers, distribution blocks or battery posts in car audio systems.

Gold plating and colour-coded covers aid

Each terminal has a gold finish that resists corrosion and maintains conductivity over time. The bundle includes five red and five black insulating covers so installers can identify positive and negative runs at a glance and prevent accidental shorts.

Crimp barrel suits 4-gauge stranded wire

The barrel accepts 4-gauge stranded conductor and the 5/16 inch spade fits common amplifier and battery terminals. The insulated covers slide over the crimped joint to protect the connection from vibration and moisture in automotive environments.

How it compares

Measured against everything we stock in Amp Wiring Kits & Install Parts, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 70% of the 259 comparable items (median $12.99).

Specifications

Product
Brand nameThe Wires Zone
Model nameTWZ-ST4-20
Product typeCable Terminals & Clips

Questions about this item

Will the gold-plated spade contacts need anti-oxidant paste or periodic re-crimping over time?

The gold finish resists oxidation, so anti-oxidant paste is not required; inspect crimps annually and re-crimp only if a connection becomes loose.

What is the first limitation when running 4-gauge wire at continuous high current?

The 5/16" stud opening sets the maximum bolt size, so the mechanical fit — not the terminal's current capacity — becomes the limiting factor.

How hot do the insulated sleeves get during all-day amplifier use?

The PVC insulation is rated for typical automotive temperatures; sleeves stay near ambient unless the crimp is poor, which would cause localised heating.

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