How to Choose Fasteners for Aerospace and High-Precision Applications

1. Understand Aerospace-Grade Standards ✈️

Aerospace fasteners must comply with international standards like:

• NAS (National Aerospace Standards)

• MS (Military Standards)

• AS (Aerospace Standards from SAE International)

These define everything from tensile strength and shear load to corrosion resistance and dimensional tolerances. Suppliers must often provide documentation for:

• Lot traceability

• Material certifications

• Heat treatment records

• Non-destructive testing (NDT) results

✅ Tip: Never substitute commercial-grade fasteners in aerospace assemblies, even for prototypes or test rigs.

2. Prioritize High-Performance Materials

Material selection is tightly linked to the performance environment. Aerospace fasteners often use:

• Titanium alloys – Lightweight, strong, corrosion-resistant

• Inconel – Ideal for extreme temperatures (jet engines, exhaust systems)

• A286 Stainless Steel – High tensile strength and oxidation resistance

• Aluminum alloys – Used in low-stress, weight-sensitive zones

Each material choice balances factors like thermal expansion, fatigue resistance, and electromagnetic compatibility.

3. Design for Vibration and Stress Fatigue

Aircraft and spacecraft endure constant mechanical stress. Fasteners must be engineered to:

• Resist loosening under vibration (e.g., lockwire holes, self-locking nuts)

• Handle cyclic loading without failure (choose appropriate preload)

• Prevent galling or seizing (especially with stainless steel)

🔧 Consider using fasteners with dry film lubricants or thread coatings to aid installation and performance.

4. Match Fasteners to the Assembly Method

Different aerospace assemblies require different fastening strategies:

• Blind rivets – Used when access is one-sided

• Hi-Lok and Hi-Lite fasteners – Controlled torque without over-tightening

• Captive fasteners – Reduce FOD (Foreign Object Debris) risk in critical areas

• Torque-set screws – For electronics or sensor housings

📌 In many aerospace applications, the fastening method is designed in from the start—avoid last-minute substitutions.

5. Don't Overlook the Traceability and Logistics Chain

Procurement in aerospace isn’t just about specs—it’s about full documentation and controlled distribution:

• Serialized batches

• Cleanroom-compatible packaging

• Shelf life certifications (for coatings and sealants)

Even packaging and labeling can be subject to audit. If your supplier can’t provide traceable documentation for each shipment, it may result in project delays or non-compliance.

Final Thoughts — Why It Pays to Work with the Right Supplier

In high-precision industries like aerospace, choosing fasteners isn’t just technical—it’s strategic. Selecting the right supplier helps you reduce risk, ensure compliance, and streamline your documentation trail.

At Fasto, we understand these challenges. While we may not yet be a Tier 1 aerospace supplier, we offer:

• Access to high-grade materials and specifications

• Custom fastener sourcing based on your design or drawing

• Full traceability support for demanding industries

Whether you're designing for altitude, vibration, or precision—we're here to help you fasten with confidence.

📧 info@fasto.cn
🌐 Explore our catalog or request samples today!