Stinger SPT520 PRO Ring Terminal 1/0 Gauge 5/16" Hole

Stinger SPT520 PRO Series 1/0 Gauge Set Screw Ring Terminal Chrome Finish with 5/16 Inch Ring Deep Wire Recesses and Polarity Bands

The SPT520 from Stinger is a PRO series 1/0 gauge set screw ring terminal in chrome finish, supplied as a single unit with red and black polarity bands included. The set screw connection uses an oversized set screw and deep wire recesses to secure 1/0 gauge wire without a crimp tool. The 5/16 inch ring suits the standard stud size used on battery terminals, distribution blocks, and amplifier power connections.

Product overview

The SPT520 uses a set screw connection rather than a crimp, securing the wire mechanically via an oversized set screw tightened against the conductor inside the deep wire recess. This provides a solid, repeatable connection that can be released and re-tightened if the installation changes, without requiring a heavy-duty crimp tool capable of handling 1/0 gauge cable. The deep wire recesses ensure no exposed wire protrudes beyond the terminal body for a clean, professional installation result.

The included red and black polarity bands allow the same chrome terminal to be identified as either positive or negative by slipping the corresponding band over the terminal body, maintaining clear polarity identification without requiring a separate red or black terminal for each polarity. Supplied as a single unit per pack.

Features and benefits

Set screw connection, no crimp tool required: The oversized set screw clamps the wire mechanically inside the terminal body, providing a solid and repeatable connection without requiring a heavy-duty crimp tool for 1/0 gauge cable.

Oversized set screw and deep wire recesses: The oversized set screw maximises clamping force against the conductor, and the deep wire recesses ensure no exposed wire protrudes beyond the terminal body for a clean, professional installation result.

Chrome finish: The chrome finish provides a premium appearance consistent with the Stinger PRO series range, suited to high-end visible installations in custom car audio builds.

Red and black polarity bands included: The included polarity bands allow the chrome terminal to be identified as either positive or negative by colour, maintaining standard polarity identification without requiring separate red or black terminal units.

5/16 inch ring for standard stud connections: The 5/16 inch inner ring diameter suits the standard stud size on battery terminals, distribution blocks, and amplifier power connections.

1/0 gauge compatibility: Designed for 1/0 gauge power wire, suited to the highest-powered car audio amplifier installations and high-current accessory applications.

Technical specs

Frequently asked questions

What is the advantage of a set screw terminal over a crimp terminal for 1/0 gauge wire?
Crimping 1/0 gauge wire requires a heavy-duty ratchet crimp tool that not all installers have available. The SPT520 set screw design clamps the wire mechanically using an oversized set screw tightened with an allen key, providing a solid and repeatable connection without specialist tooling. The connection can also be released and re-tightened if the installation needs to be reconfigured.

What do the polarity bands do?
The included red and black polarity bands slip over the chrome terminal body to identify the terminal as either positive power or negative ground by colour. This allows a single chrome terminal to be used for both polarities while maintaining standard colour-coded polarity identification throughout the installation.

How does the SPT520 compare to the SPT5101 crimp ring terminal?
Both are 1/0 gauge 5/16 inch ring terminals for the same connection points. The SPT5101 is a crimp terminal requiring a heavy-duty crimp tool and is supplied as a 2-pack with one red and one black terminal. The SPT520 is a set screw terminal that requires only an allen key, supplied as a single unit with polarity bands for both polarities. The set screw design is the more practical choice when a heavy-duty crimp tool is not available.

What tool is required to tighten the set screw on the SPT520?
An allen key of the appropriate size for the oversized set screw is required to tighten the terminal onto the wire. No crimp tool is needed. Contact us if you need further guidance on installation for this terminal.

Is the SPT520 suitable for ground connections as well as power?
Yes. The included polarity bands allow the SPT520 to be used for either positive power or negative ground connections. Apply the red band for positive and the black band for ground to maintain standard polarity identification throughout the installation.