RCOS Steel Open Rivetnut | Countersunk Round | M3-M16

Steel Open End Rivetnuts for Materials up to 10.70mm Thick

The RCOS Round Countersunk Head Open End Rivetnut is designed to provide a strong, reliable threaded insert in materials up to 10.70mm thick. Manufactured from high-quality zinc-plated steel, these rivetnuts create durable, reusable metric threads without the need for welding, tapping, or access to the reverse side of the material.

Featuring a countersunk head design, these rivetnuts sit flush with the material surface when installed correctly, creating a clean, professional finish. The open end construction allows the use of longer bolts and screws where required, making them a versatile fastening solution for engineering, manufacturing, and fabrication applications.

Ideal for Flush Finish and Heavy Grip Applications

RCOS rivetnuts are ideal for applications requiring a flush finish combined with an extended grip range. Designed for thicker materials than standard rivetnuts, they provide a strong load-bearing thread while maintaining a smooth surface appearance.

Available Sizes

• M3 (3 Lengths)
• M4 (3 Lengths)
• M5 (3 Lengths)
• M6 (4 Lengths)
• M8 (4 Lengths)
• M10 (3 Lengths)
• M12 (3 Lengths)
• M16 (3 Lengths)

Key Features

• Suitable for materials up to 10.70mm thick
• Countersunk head for a flush, professional finish
• Open end design for versatile fastening applications
• Round body for standard installation applications
• Manufactured from durable steel
• Zinc Plated Cr3 finish for enhanced corrosion resistance
• RoHS compliant
• Creates strong, reusable metric threads
• Fast installation from one side of the application
• Wide size range from M3 to M16

Product Specifications

Code: RCOS
Shape: Round
Head Style: Countersunk
Style: Open End
Material: Steel
Body Type: Metric
Finish: Zinc Plated Cr3 (RoHS Compliant)
Maximum Material Thickness: 10.70mm

Typical Applications

• Sheet metal fabrication
• Automotive assemblies
• Electrical enclosures
• HVAC systems
• Industrial machinery
• Metal furniture manufacture
• Engineering projects
• Construction equipment
• General repair and maintenance

Why Choose Round Countersunk Head Steel Open End Rivetnuts?

Round countersunk head steel open end rivetnuts are ideal when a flush-fitting threaded insert is required in thicker materials. The countersunk head provides a smooth, professional finish, while the open end design offers maximum fastening flexibility. Their extended grip range makes them particularly suitable for demanding engineering and industrial applications.

Product Summary

The RCOS Round Countersunk Head Steel Open End Rivetnut provides a strong, reusable threaded insert for materials up to 10.70mm thick. Featuring a flush-fitting countersunk head and durable zinc-plated steel construction, these rivetnuts are ideal for engineering, fabrication, automotive, and industrial applications. Available in M3 to M16 sizes.