Rockford Fosgate RFT4 4 AWG Set Screw Ring Terminal

4 AWG Set Screw Ring Terminal 8.15mm Hole Diameter, HPP Platinum Finish, High Current, Superior Corrosion Resistance. 4-Pack.

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Product Overview

The Rockford Fosgate RFT4 is a 4 AWG set screw ring terminal with 8.15mm hole diameter HPP (High Performance Plating) platinum finish for high-current, corrosion-resistant performance. The set screw mechanism secures the wire in the terminal barrel by tightening a screw with a hex key, rather than requiring a crimp tool. Supplied as a 4-pack. The 8.15mm ring hole accommodates standard automotive terminal studs of approximately 5/16" (8mm) diameter.

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Key Specifications

• Part number: RFT4
• Wire gauge: 4 AWG
• Terminal type: Set screw ring
• Ring hole diameter: 8.15mm ✓
• Plating: HPP (High Performance Plating) — platinum finish ✓
• Corrosion resistance: Superior (HPP confirmed) ✓
• Application: High current ✓
• Pack quantity: 4 terminals ✓
• Overall dimensions: Not specified — confirm with Rockford Fosgate
• Maximum current rating: Not specified — confirm with Rockford Fosgate
• Weight: Not specified

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Features & Benefits

• Set Screw Connection — No Crimp Tool Required — The set screw mechanism secures the wire by tightening a hex screw against the conductor inside the barrel — a quick, tool-free installation that can be tightened, loosened, and re-tightened without damaging the terminal. A hex key (Allen key) is the only tool required.
• 8.15mm Hole Diameter — The confirmed 8.15mm ring hole accommodates standard 5/16" automotive terminal studs used on amplifier power and ground terminals, distribution blocks, and chassis ground points.
• HPP Platinum Plating — High Current, Superior Corrosion Resistance — HPP (High Performance Plating) is Rockford Fosgate's high-grade conductive terminal coating, providing low contact resistance and long-term resistance to oxidation and corrosion in vehicle environments.
• 4 AWG Compatibility — Sized for 4 AWG wire — commonly used for amplifier power and ground runs on car audio systems rated in the 250–750W RMS range.
• 4-Pack — Four terminals per purchase.

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Technical Specs

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Compatible With / Goes Well With

Suitable for:

• 4 AWG amplifier power and ground connections
• 5/16" terminal studs on amplifiers, distribution blocks, and chassis ground points
• Installations where re-tightenable connections are preferred over permanent crimps

Pairs well with:

• Rockford Fosgate 4 AWG wire
• Rockford Fosgate RFTS4 (4 AWG crimp ring terminal, same gauge and application)

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Frequently Asked Questions

What is a set screw ring terminal and how does it differ from a crimp terminal?

A set screw terminal uses a threaded screw to clamp the wire conductor inside the barrel — tighten the set screw with a hex key to secure the connection. A crimp terminal uses a crimping tool to deform the barrel around the wire permanently. Set screw terminals can be disconnected and reconnected without replacing the terminal; crimp terminals produce a permanent connection that cannot be released without cutting.

What stud size does the 8.15mm hole fit?

8.15mm is compatible with standard 5/16" (approximately 7.9mm) automotive terminal studs — the common size used on amplifier power input terminals, distribution block posts, and chassis ground bolts.

How many terminals are in the pack?

Four terminals per pack.

What wire gauge is this terminal for?

4 AWG. Do not attempt to use with larger or smaller gauge wire — the barrel is sized for 4 AWG and the set screw requires correct wire fill for a secure grip.

Can the set screw terminal be reused after removal?

Yes — the set screw can be loosened to release the wire and retightened onto the same or different wire. This makes set screw terminals useful for temporary installations or where future service access is required.