?unique=8504471)
ABS0691-020 – Airbus Standard Structural Aerospace Stud
Available now on the Airparts.aero Marketplace.
The ABS0691-020 is a high-precision structural fastener manufactured to the Airbus ABS (Airbus Standard) specification. This aerospace stud is designed for critical airframe applications where high shear and tensile strength are required to join structural members, mounting brackets, or accessory components to primary airframe assemblies. Unlike standard bolts, the ABS0691 series is engineered to be permanently or semi-permanently installed into a threaded hole or through-hole, providing a stable, high-strength threaded post for component attachment.
As a flight-critical fastener, the ABS0691-020 is fabricated from high-strength alloy steel, meticulously heat-treated to achieve the metallurgical properties required for the demanding environment of modern turbine aircraft. The "020" dash number refers to the specific length and diameter configuration as defined by the Airbus technical drawings. This stud is commonly found in the engine pylons, wing-to-fuselage fairings, and structural brackets of the A320 and A330 families, where consistent preload and fatigue resistance are paramount.
Key Features
Aerospace-Grade Alloy Steel: Manufactured from premium chromoly or high-carbon alloy steel, heat-treated for a minimum tensile strength typically exceeding 125,000 psi.
Precision Roll-Threaded: Threads are rolled after heat treatment rather than cut, ensuring continuous grain flow and vastly superior fatigue life compared to standard fasteners.
Corrosion Resistance: Finished with a protective plating (often cadmium or zinc-nickel) to prevent galvanic corrosion when in contact with dissimilar aluminum or composite structures.
Controlled Preload: Designed to provide precise clamping force, reducing the risk of joint separation under the high-vibration loads of flight.
Close-Tolerance Shank: The unthreaded portion is precision-ground to ensure a snug fit within the airframe bore, minimizing "play" and maximizing shear-load transfer.
Technical Specifications
Part Number: ABS0691-020
Manufacturer: Various Airbus-Approved Fastener Manufacturers
Component Type: Structural Aerospace Stud
Material: High-Strength Alloy Steel (per ABS standards)
Finish: Cadmium Plate or Zinc-Nickel (Refer to specific mod-standard)
Thread Type: MJ Standard Metric Aerospace Thread (Fine Pitch)
Shank Diameter: Per ABS0691 dimensional table
Length: Defined by the -020 suffix configuration
Governing Specifications: ABS0691, EN standards for aerospace fasteners
Certification: EASA / FAA-PMA / Airbus OEM Standard
Aircraft Compatibility
Airbus A318 / A319 / A320 / A321 (CEO & NEO)
Airbus A330-200 / 300 Series
Airbus A340 Series
Note: ABS series hardware is specific to Airbus airframe standards. Always cross-reference the Illustrated Parts Catalog (IPC) or Structural Repair Manual (SRM) to ensure the -020 dash number is correct for your specific station and application.
Applications
Structural Brackets: Securing avionics racks, hydraulic lines, or interior structures to the primary fuselage.
Access Panel Retention: Used where repeated removal of nuts is required without wearing out the threads in an expensive airframe component.
Engine Pylon Interfaces: Secondary attachment points for fairings and cowlings.
Why Choose ABS0691-020?
Choosing the genuine ABS0691-020 ensures that the fastener’s mechanical properties—including its ductility, ultimate tensile strength, and shear capacity—align perfectly with the Airbus design envelope. Utilizing non-certified or "commercial equivalent" studs in an Airbus airframe risks catastrophic failure due to hydrogen embrittlement or fatigue cracking. The ABS0691-020 offers the documented traceability and metallurgical integrity required to maintain the aircraft's type certificate and operational safety.
The ABS0691-020 is designed based on the engineering principle of Elastic Clamping Integrity. In a structural joint, the stud acts as a rigid member that must maintain a constant Preload Force to prevent the joined surfaces from shifting under Cyclic Aerodynamic Loading. The material is typically an anisotropic alloy steel, where the forging and rolling processes align the molecular grain structure with the axis of tension.
By utilizing Roll-Threading (per ISO 5855 / MJ thread standards), the ABS0691-020 features a radiused root that significantly reduces the Stress Concentration Factor ($K_t$). This design prevents the initiation of fatigue cracks that are common in cut-threaded industrial fasteners. Furthermore, the finish is carefully applied to mitigate Hydrogen Embrittlement, a phenomenon where atomic hydrogen enters the steel lattice during plating, leading to brittle fracture under static load. This attention to materials science ensures that the ABS0691-020 remains a reliable link in the Airbus structural chain across thousands of flight hours.
Note: The ABS0691-020 is a structural fastener. It must be torqued to the specific values mandated in the Airbus Aircraft Maintenance Manual (AMM) or Structural Repair Manual (SRM). Reusing fasteners that show signs of thread deformation, corrosion, or over-torque is strictly prohibited. Installation must be performed by a certified A&P or EASA Part 66 mechanic.
Documentation
No public-facing OEM or regulatory documentation was located for this specific part number. Please refer to the Airbus Standard (ABS) Drawing repository or the aircraft-specific SRM for technical dimensions and torque tables.
