BS A 103:2025
AEROSPACE SERIES. Nuts, hexagonal, ordinary, thin, slotted and castle, unified threads, alloy steel, cadmium plated. Specification Classification Rm ≥ 145 600 lbf/in2 (1 004 MPa) in mating male fastener at ambient temperature | +190 °C
| Standard number: | BS A 103:2025 |
| Pages: | 14 |
| Released: | 2025-07-22 |
| ISBN: | 978 0 539 05128 5 |
| Status: | Standard |
| Pages (English): | 14 |
| ISBN (English): | 978 0 539 05128 5 |
BS A 103:2025 Aerospace Series: Hexagonal Nuts
Introducing the BS A 103:2025 Aerospace Series, a comprehensive specification for hexagonal nuts designed to meet the rigorous demands of the aerospace industry. This standard encompasses a variety of nut types, including ordinary, thin, slotted, and castle nuts, all featuring unified threads and crafted from high-quality alloy steel with a cadmium-plated finish.
Product Features
- Standard Number: BS A 103:2025
- Release Date: July 22, 2025
- Pages: 14
- ISBN: 978 0 539 05128 5
- Status: Standard
Exceptional Strength and Durability
These nuts are engineered to deliver exceptional performance under high-stress conditions. With a classification of Rm ≥ 145,600 lbf/in2 (1,004 MPa), they are designed to withstand significant tensile forces when paired with a mating male fastener. This makes them ideal for use in critical aerospace applications where reliability and safety are paramount.
Temperature Resilience
The BS A 103:2025 nuts are built to perform in a wide range of temperatures, maintaining their integrity and strength at ambient conditions and up to +190 °C. This temperature resilience ensures that they can be used in various environments, from the cold of high altitudes to the heat generated by high-speed flight.
Versatile Design
The specification includes a variety of nut designs to suit different applications:
- Ordinary Nuts: Standard hexagonal shape for general use.
- Thin Nuts: Reduced height for applications with limited space.
- Slotted Nuts: Designed for use with a cotter pin or safety wire to prevent loosening.
- Castle Nuts: Feature slots for secure locking with a cotter pin, ideal for high-vibration environments.
High-Quality Materials
Manufactured from alloy steel, these nuts offer superior strength and resistance to wear and tear. The cadmium plating provides an additional layer of protection against corrosion, ensuring long-lasting performance even in harsh conditions.
Compliance and Standards
The BS A 103:2025 standard is a testament to the commitment to quality and safety in the aerospace industry. By adhering to this specification, manufacturers can ensure that their products meet the stringent requirements necessary for aerospace applications, providing peace of mind to engineers and designers.
Applications
These nuts are suitable for a wide range of aerospace applications, including:
- Aircraft assembly and maintenance
- Spacecraft construction
- High-performance automotive engineering
- Any application requiring high-strength, temperature-resistant fasteners
Conclusion
The BS A 103:2025 Aerospace Series hexagonal nuts are an essential component for any aerospace project, offering unmatched strength, durability, and versatility. Whether you're designing a new aircraft or maintaining an existing fleet, these nuts provide the reliability and performance you need to ensure success.
BS A 103:2025
This standard BS A 103:2025 AEROSPACE SERIES. Nuts, hexagonal, ordinary, thin, slotted and castle, unified threads, alloy steel, cadmium plated. Specification is classified in these ICS categories:
- 49.030.30 Nuts