Astro Pneumatic 100PC RN4M M4 4mm Steel Rivet Nuts The Astro Pneumatic 100PC RN4M M4 4mm Steel Rivet Nuts is a 100 piece pack of high quality zinc plated knurled steel rivet nuts for use with Astros PRN Series Pneumatic Rivet Nut Setting Guns. Also compatible with standard Rivet Nut setting tools. Astro Pneumatic Air Tools are ideal for body shop repair, muffler and exhaust work and provide the highest quality in the industry to assure you get the job done right.

With over 40 years of importing product into the U.S. Automotive Aftermarket, Astro Pneumatic Tool Co. offers several product categories for one-stop shopping. Our products under our own brand name Astro Pneumatic include the popular tool and equipment classics, as well as innovative new items.