Product Description

The Astro Tools ONYX Pneumatic Rivet Nut Setting Gun (SKU: PRN516) is a professional-grade, air-powered fastening tool engineered to automate and accelerate the installation of SAE threaded inserts. Designed to completely eliminate the physical strain and hand fatigue associated with manual rivet nut setters, this pneumatic gun utilizes a high-speed 600 RPM motor to compress and set 1/4" and 5/16" rivet nuts flawlessly. By combining rapid automated pulling power with a precision dial-in regulator, technicians can achieve consistent, factory-grade thread installations on every trigger pull.

In fast-paced collision repair, custom metal fabrication, and restoration environments, workflow speed and accuracy are critical. The PRN516 stands out with its toothless "Quick-Change" mandrel system, allowing operators to seamlessly swap between 1/4" and 5/16" setups without reaching for wrenches. Featuring dedicated forward and reverse triggers, this gun automatically threads the nut on, sets it flush into the panel, and spins out the mandrel in seconds, drastically improving shop throughput during high-volume panel assembly.

Key Features

• Quick-Change Mandrel System: Engineered with an innovative collar that allows technicians to quickly swap between mandrel sizes on the fly without requiring secondary hand tools.

• Included SAE Mandrels: Ships ready to work straight out of the box with heavy-duty 1/4"-20 and 5/16"-18 mandrels included.

• Dial-In Pressure Regulator: Features an integrated air flow regulator at the base of the tool to perfectly tune the pulling force based on rivet nut size and material composition (e.g., dialing pressure down for soft aluminum or up for steel).

• Dual-Action Triggers: Designed with independent forward and reverse rockers for lightning-fast threading, setting, and mandrel extraction without taking your eyes off the panel.

• Lightweight Ergonomics: Weighing just under 3.5 lbs, the tool provides heavy-duty pneumatic pulling power without causing operator wrist fatigue during repetitive, all-day fabrication tasks.

Ideal For

• High-Volume Auto Body Shops: Dramatically accelerating the installation time of threaded inserts on structural panels, fenders, and interior trim where the backside is inaccessible.

• Custom Metal Fabrication: Rapidly setting reliable 1/4" and 5/16" mounting points for aftermarket accessories, custom brackets, and sheet metal builds.

• Fleet & Trailer Assembly: Providing a fatigue-free, highly consistent riveting solution for technicians executing hundreds of fastening cycles per shift on commercial trailers or utility beds.

Technical Specifications

Common Questions

Q: Will this tool set metric rivet nuts?
A: Out of the box, the PRN516 comes equipped with standard SAE mandrels (1/4" and 5/16"). If your shop primarily uses metric hardware in this size range, Astro Tools makes a metric version of this specific gun (the PRN8M) that handles M6 and M8 metric sizes.

Q: How do I adjust the tool so it doesn't strip the threads?
A: The tool features an adjustable air regulator dial. You adjust this regulator to decrease the pulling power for softer metals (like aluminum) or smaller inserts, and increase it for harder steel nuts. It is highly recommended to perform a test-set on a scrap piece of metal of the same thickness to dial in the perfect pressure before moving to the actual vehicle panel.

Q: Does it require a specific type of air compressor?
A: No, it operates on standard shop air and requires a standard 1/4" air inlet. Because it uses short, high-torque pneumatic bursts rather than continuous high-volume air (like a sander), it runs highly efficiently on most standard automotive shop air compressors capable of maintaining 90 PSI.

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