Product Description

The Astro Tools ONYX Pneumatic Rivet Nut Setting Gun (SKU: PRN12) is a professional-grade, air-powered fastening tool built to handle high-demand structural riveting applications. Engineered specifically to tackle large-diameter SAE rivet nuts, this tool completely eliminates the immense physical strain and hand fatigue required to set heavy 3/8" and 1/2" threaded inserts manually. By combining a high-torque 400 RPM pneumatic motor with an adjustable precision regulator, technicians can achieve perfectly consistent, factory-grade thread installations on every single pull.

In modern collision repair, automotive restoration, and custom metal fabrication, setting large structural rivet nuts is notoriously difficult with standard hand tools. The PRN12 streamlines this process. The integrated dial-in regulator allows technicians to precisely control the pulling force based on the exact size and material composition of the rivet nut (such as steel versus softer aluminum). Featuring dedicated forward and reverse triggers, this gun threads into the nut, sets it into the panel, and smoothly reverses out in a matter of seconds, drastically improving shop throughput on heavy fabrication days.

Key Features

• Large Diameter Capacity: Engineered with a heavy-duty pneumatic drive system specifically rated to compress and set large rivet nuts up to 1/2" in diameter.
• Included SAE Mandrels: Ships completely ready to work with interchangeable 3/8"-16 and 1/2"-13 heavy-duty mandrels.
• Dial-In Pressure Regulator: Features a precision air regulator knob that allows you to easily adjust the pulling power to match specific rivet nut sizes and metal compositions, preventing over-compression and thread stripping.
• Dual-Action Triggers: Designed with independent forward and reverse rocker actions, allowing for ultra-fast engagement, setting, and mandrel removal without taking your eyes off the workpiece.
• Lightweight Ergonomics: Despite its massive pulling capacity, the tool weighs just under 3.5 lbs, reducing operator fatigue during repetitive, high-volume panel assembly tasks.

Ideal For

• Heavy Custom Fabrication: Installing robust 3/8" and 1/2" threaded mounting points for heavy-duty truck accessories, custom brackets, and reinforced chassis plates.
• High-Volume Collision Repair: Dramatically accelerating the installation time of threaded inserts on structural panels and frame rails where the backside is inaccessible.
• Fleet Maintenance & Assembly: Providing a fatigue-free, perfectly consistent riveting solution for technicians assembling or maintaining large commercial utility beds and trailers.

Technical Specifications

Common Questions

Q: Will this tool set metric rivet nuts?
A: Out of the box, the PRN12 comes equipped with standard SAE mandrels (3/8" and 1/2"). If your shop primarily uses metric hardware, Astro Tools offers a metric version of this specific gun (the PRN12M) that includes M10 and M12 mandrels, or you can source the metric mandrels separately to swap into this unit.

Q: How do I adjust the tool to prevent stripping the threads inside the rivet nut?
A: The tool features a dial-in regulator at the base. You simply adjust this regulator to decrease the air pressure for softer metals (like aluminum) or smaller nuts, and increase it for hard steel or larger diameter nuts. It is always recommended to test-set a rivet nut on a scrap piece of identical sheet metal to dial in the perfect pressure before moving to the actual vehicle.

Q: Does it require a specific type of air compressor?
A: It operates on standard shop air (requiring a 1/4" air inlet). Because it executes short, high-torque bursts rather than continuous high-volume spinning (like a die grinder), it can be efficiently run by most standard automotive shop air compressors capable of maintaining 90 PSI.

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