Marson 47184 MRN Series Round Body Steel Rivet Nut Insert 3/8-16 UNC-2B Flat Head 20-Pack

The Marson M47184 is a round body rivet nut insert (also known as a threaded insert or rivnut) from the MRN Series, offering a 3/8-16 UNC-2B thread in a flat head, open-end steel construction. Sold in a convenient 20-pack, these rivet nuts are designed to create strong, permanent threaded connections in thin or soft materials such as sheet metal, plastics, and composites where a standard nut cannot be used from the backside.

Key Features:

• Thread Size: 3/8-16 UNC-2B
• Head Style: Flat head, non-keyed
• Body Style: Round body, open end
• Grip Range: 0.115 in – 0.200 in (2.92 mm – 5.08 mm)
• Head Diameter: 0.781 in (19.83 mm)
• Head Height: 0.088 in (2.23 mm)
• Body Length: 0.938 in (23.83 mm)
• Set Body Length: 0.780 in (19.81 mm)
• Hole Size Required: 0.490 in min – 0.500 in max (use 1/2 in drill bit)
• Body Material: Steel 1008/1010/1110
• Finish: Zinc Clear Trivalent Chromate per ASTM B-633 Type III, Class 2
• RoHS 3 Compliant: Yes
• Quantity: 20 per pack

The zinc clear trivalent chromate finish provides corrosion resistance while meeting RoHS 3 environmental compliance standards. These rivet nuts are well-suited for automotive, marine, RV, and general fabrication applications where a reliable threaded anchor is needed in one-sided access situations. Installation requires a compatible rivet nut setting tool with a 3/8-16 mandrel.