Views: 100 Author: Site Editor Publish Time: 2025-04-25 Origin: Site
Introduction to Standoffs (Press Riveting Standoffs)
Standoffs, also known as press riveting standoffs or self-clinching standoffs, are specialized fasteners designed for permanent installation into thin metal sheets or panels. They feature internal threads and are installed using a press or automated riveting equipment, creating a durable threaded connection without requiring welding or additional hardware. Commonly used in industries like electronics, automotive, and aerospace, standoffs provide high strength, vibration resistance, and space-saving solutions for assembling components.
Standoffs are categorized based on their design, application, and installation requirements:
Blind Hole Standoffs (BSO/BSOS)
Design: These have a closed end (blind hole) and are suitable for applications requiring a concealed threaded connection. They are ideal for thicker materials or longer studs where a through-hole is impractical.
Examples: BSO (carbon steel) and BSOS (stainless steel).
Through-Hole Standoffs (SO/SOS)
Design: Feature a continuous internal thread through the entire stud. They are used for general-purpose applications and are easier to install in thinner materials.
Examples: SO (carbon steel) and SOS (stainless steel).
Countersunk Head Standoffs (CSS/CSC/CSOS/CSOC)
Design: Flush-mounted heads for applications requiring a smooth surface. CSS types have a 12-sided head, while CSOS variants use a hexagonal head. They are typically made of stainless steel (SUS) and require thicker base materials (e.g., 1.6–2.4 mm).
Flange Head Standoffs (KFB3/KFE/KFSE)
Design: Feature a flanged head for increased load distribution. Commonly used in PCBs or thick panels (1.27–1.65 mm).
Grounding Standoffs (SOxG Series)
Design: Equipped with serrated teeth at the base to ensure electrical conductivity, making them ideal for grounding applications in electronic devices.
Double-Ended Standoffs (DSO/DSOS/BDSO/BDSOS)
Design: Threaded on both ends to connect components symmetrically. DSOS (stainless steel) is more common than DSO (carbon steel).
Waterproof Standoffs (B/BS/BB/BBS)
Waterproof standoff is a connector specifically designed for waterproofing environments, with a closed bottom design for waterproofing .The difference between the B/BS series and the BB/BS series waterproof standoffs is that one has steps while the other does not.
Material and Surface Treatments
Materials:
Stainless Steel (SUS): Offers corrosion resistance and durability, widely used in harsh environments.
Carbon Steel: Cost-effective for general applications but requires surface treatments to prevent rust.
Aluminum: Lightweight and corrosion-resistant, suitable for aerospace and electronics.
Surface Treatments:
Zinc plating (common for carbon steel).
Passivation (for stainless steel to enhance corrosion resistance).
Nickel coating (improves wear resistance and aesthetics).
Appearance:
Hexagonal or 12-sided head for tool engagement.
Cylindrical body with a knurled or serrated base to enhance grip during installation.
A relief groove (knurl) near the base to accommodate material deformation during pressing.
Installation:
Pre-drilled Holes: Holes must match specified tolerances (e.g., ±0.075 mm) and are typically punched or drilled.
Press Riveting: A hydraulic or pneumatic press applies force to embed the standoff into the material. Impact methods are avoided to prevent deformation.
Applications:
Electronics: Mounting PCBs, chassis, and enclosures.
Automotive: Securing panels and electrical components.
Aerospace: Lightweight assembly of aircraft interiors.
Common Sizes:
| Thread Size (Metric) | Shank Diameter (mm) | Pre-drilled Hole (mm) |
|---|---|---|
| M3×0.5 | 5.4 | 5.4 |
| M4×0.7 | 6.0 | 6.0 |
| M5×0.8 | 7.2 | 7.2 |
| M6×1.0 | 8.7 | 8.7 |
Standoffs are versatile fasteners critical to modern manufacturing, offering reliable threaded connections in thin materials. By selecting the appropriate type, material, and size, engineers can optimize assembly efficiency and product durability. For detailed specifications or custom requirements, refer to technical datasheets or manufacturers like Shenzhen Hengbo Precision Hardware.
