Two Lugs Floating Anchor Nut Double Ear Supporting Plate Self Locking Anchor Nuts

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What is a Floating Anchor Nut?

A floating anchor nut is a specialized type of fastener designed to accommodate misalignment between parts during assembly. It typically consists of a nut housed within a frame or cage that allows limited movement in multiple directions (such as lateral, vertical, or angular). This “floating” feature compensates for tolerances in manufacturing or assembly, ensuring secure threaded engagement with bolts or screws even when holes are slightly misaligned.

Materials

• Carbon Steel: Common for general applications due to its strength and cost-effectiveness.

• Stainless Steel (e.g., 304 or 316 grades): Offers corrosion resistance for harsh environments.

• Aluminum: Lightweight and corrosion-resistant, used in aerospace and automotive industries.

• Brass: Provides good corrosion resistance and electrical conductivity, often used in electronics.

• Alloy Steel: Heat-treated for high-strength requirements.

Surface Treatments

• Zinc Plating: Provides basic corrosion resistance and a shiny appearance.

• Cadmium Plating: Offers excellent corrosion resistance but is restricted due to environmental concerns.

• Passivation (for stainless steel): Enhances corrosion resistance by removing free iron from the surface.

• Anodizing (for aluminum): Improves corrosion resistance and allows color coding.

• Phosphate Coating: Improves adhesion for paint and provides mild corrosion resistance.

• Nickel Plating: Adds wear resistance and a polished finish.

Specifications

• Thread Sizes: Commonly from M3 to M12 (metric) or #4 to 1/2 inch (imperial).

• Float Range: Typically ±0.5mm to ±1.5mm in lateral directions.

• Standards: May comply with NASM, MS, or other aerospace/industrial standards.

• Installation Methods: Press-in, riveted, or welded designs based on application needs.

• Temperature Range: Varies by material; e.g., stainless steel handles up to 800°C.

Application Fields

• Aerospace: Used in aircraft panels, engines, and interior assemblies to handle vibration and thermal expansion.

• Automotive: Employed in chassis, body panels, and engine components for ease of assembly.

• Electronics: Securely fastens components in devices where precision alignment is critical.

• Industrial Machinery: Compensates for misalignment in heavy equipment and modular structures.

• Marine: Stainless steel or brass variants prevent corrosion in marine environments.

Excellent Case: Aircraft Wing Assembly

In the aerospace industry, floating anchor nuts are critical for assembling aircraft wings. The wing structure involves multiple layers of composite panels, ribs, and brackets, all requiring precise bolt fastening. However, thermal expansion, vibration, and manufacturing tolerances can cause hole misalignment. By using stainless steel floating anchor nuts (e.g., MS2100 series) with cadmium plating for corrosion resistance, engineers ensure that bolts engage smoothly without cross-threading. The float capability (±1mm) allows the nut to self-align during bolt insertion, reducing assembly time and preventing damage to components. This enhances structural integrity, maintains safety standards, and minimizes maintenance needs over the aircraft’s lifespan.