Overview

Stainless steel semi-tubular (or half hollow shank) rivets with oval or round heads are versatile mechanical fasteners designed for joining two or more materials permanently. Unlike solid rivets, their partially hollow shank requires less force for installation and allows for a flared or rolled clinch on the blind side, creating a strong, secure, and finished joint. The choice between oval and round heads depends on aesthetic preference and the specific load-bearing requirements, while stainless steel construction ensures excellent corrosion resistance and durability in challenging environments.

Definition

Stainless Steel Oval Head / Round Head Semi-Tubular Rivets are permanent mechanical fasteners made from stainless steel (e.g., SS304, SS316). They feature a pre-formed head (either oval or round) and a partially hollow shank. The hollow portion extends from the blind end for a specific depth, which facilitates easier upsetting (flaring or crimping) during installation to form the second, or “set,” head. This design requires less force than solid rivets and is ideal for joining a wide range of materials where a strong, aesthetically pleasing, and corrosion-resistant joint is needed.

Key Features

• Semi-Tubular (Half-Hollow) Shank: The partially hollow design reduces the force needed for installation and allows the shank end to flare or roll easily, forming the clinch.
• Head Styles:
  • Oval Head: Offers a slightly domed, aesthetically pleasing profile that sits somewhat flush with the surface, providing a smooth finish.
  • Round Head: Features a more pronounced, fully rounded dome, providing a strong bearing surface against the material.
• Stainless Steel Construction: Made from SS304, SS316, or similar grades, providing excellent resistance to corrosion, rust, and chemical exposure, making them suitable for harsh environments.
• Permanent Fastening: Once installed, these rivets create a robust and permanent joint that is resistant to loosening from vibration.
• Material Compatibility: Can join a variety of materials, including metals, plastics, fabrics, and composites.

Typical Applications

• Automotive Industry: Used in various assembly applications for interior components, body panels, and structural elements where corrosion resistance is critical.
• Electronics and Appliances: Fastening internal components, chassis, and housing parts in ovens, refrigerators, washing machines, and electronic enclosures.
• Sheet Metal Fabrication: Joining pre-punched or drilled sheet metal components in HVAC, ductwork, and general fabrication.
• Food Processing Equipment: Stainless steel is ideal due to its hygiene properties and resistance to cleaning agents in food-grade machinery.
• Marine Applications: Excellent for boat fittings, marine hardware, and assemblies exposed to saltwater.
• Consumer Goods: Used in toys, sporting goods, luggage, and other items where a durable and aesthetically pleasing joint is required.
• General Manufacturing: Versatile for a wide array of assemblies needing a strong, permanent, and corrosion-resistant connection.

Advantages

• Corrosion Resistance: Stainless steel material provides superior protection against rust and degradation, ensuring longevity in challenging conditions.
• Strong, Permanent Joints: Creates a robust and secure connection that is highly resistant to vibration and fatigue.
• Easier Installation: The semi-tubular design requires less force than solid rivets, making installation quicker and more efficient, often allowing for automated riveting processes.
• Versatility: Can effectively join dissimilar materials and delicate components without causing damage.
• Finished Appearance: The controlled clinch and choice of head styles provide a neat and professional finish.
• Cost-Effective: Often a more economical fastening solution than welding or threaded fasteners for permanent joints, especially in high-volume production.