AN970 Flat Washers
Large Diameter Aircraft Steel Washers | FAA/PMA Approved | EASA Part-21 Certified
AN970 Large Diameter Flat Washers - European Distribution
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Airpart Supply Ireland is your trusted European distributor for AN970 Large Diameter Flat Washers, stocked in our Dublin warehouse for fast delivery across Ireland, Germany, France, Spain, Italy, Netherlands, Belgium, and all EU countries. AN970 flat washers provide superior load distribution compared to standard AN960 washers, featuring larger outer diameters while maintaining .063" thickness. These aircraft hardware components are essential for structural applications requiring enhanced bearing surface area in Cessna, Piper, Beechcraft, Cirrus, Diamond, Mooney, and Grumman aircraft. Manufactured to strict AN (Army-Navy) specifications and supplied with cadmium plated steel finish (MIL-DTL-5624 Type II), AN970 washers meet all FAA/PMA and EASA Part-21 certification requirements for European aviation operations. Available in four standard sizes from 3/16" through 3/8" bolt diameters. All AN970 washers ship from our Dublin, Ireland facility with full EASA Part-21 documentation, VAT-compliant invoicing, and express delivery throughout the European Union. Compatible with AN3 bolts, AN4 bolts, AN5 bolts, and AN6 bolts for complete airframe and engine mounting assemblies. |
AN970 Technical Specifications
Material: Cadmium Plated Steel (QQ-P-416 Type II Class 3)
Specification: AN970 / MS20002 Standard
Finish: Cadmium Plated for corrosion protection
Complete Size Range
| Bolt Size | Outer Diameter (O.D.) | Inner Diameter (I.D.) | Thickness | Part Number |
|---|---|---|---|---|
| 3/16" | .875" | .203" | .063" | AN970-3 |
| 1/4" | 1.125" | .265" | .063" | AN970-4 |
| 5/16" | 1.375" | .328" | .063" | AN970-5 |
| 3/8" | 1.625" | .390" | .063" | AN970-6 |
⚠ Important Note: AN970 washers feature significantly larger outer diameters than AN960 washers while maintaining the same .063" thickness. This increased bearing surface provides superior load distribution for structural applications. Not interchangeable with AN960 Light Series or AN960 Regular Series washers.
Aircraft Applications
Airframe Structural Assemblies
AN970 large diameter flat washers are essential for primary structural attachments where increased bearing surface prevents material crushing in thinner aluminum alloys. Used extensively in wing attachment fittings, landing gear mounting brackets, Cessna strut attachments, fuselage bulkhead connections, and tail assembly hard points. The larger diameter distributes clamping loads across wider areas, reducing stress concentrations in critical airframe joints.
Engine Mounting Systems
Critical for Lycoming and Continental engine mount installations where engine vibration and thrust loads require maximum bearing surface. AN970 washers work with Barry engine mounts, dynafocal mounting rings, and Lord isolators to ensure proper load transfer between engine and airframe structure.
Heavy-Duty Systems Mounting
Specified for avionics racks, battery trays, oxygen bottle installations, fire extinguisher brackets, fuel system components, and electrical equipment mounting where equipment weight or vibration requires enhanced load distribution. Compatible with aluminum, steel, and composite mounting structures.
Control System Applications
Used in flight control bellcrank pivots, rudder pedal assemblies, throttle quadrant mountings, and trim system attachments where side loading or angular forces benefit from increased bearing surface. Often specified in conjunction with AN960 washers and safety wire provisions.
Why Choose AN970 Washers from Airpart Supply Ireland?
Enhanced Load Distribution
- Superior bearing surface area compared to standard AN960 washers prevents material crushing in soft alloys
- Reduced stress concentrations in critical structural joints extends component service life
- Wider load distribution ideal for thin sheet metal and composite panel attachments
- Prevents pull-through failures in high-vibration applications typical of general aviation aircraft
Dublin Warehouse – Fast European Delivery
- Strategic Dublin, Ireland location ensures 2-5 business day delivery across EU countries
- No customs delays or Brexit complications – seamless EU-to-EU shipping from our Irish facility
- Free express shipping available to selected European countries on qualifying orders
- Same-day dispatch for orders received before 2:00 PM Irish time
VAT Compliance & EASA Documentation
- VAT-compliant invoicing with Irish VAT registration for EU business customers
- Complete EASA Part-21 documentation including Manufacturer's Certificate of Conformity
- FAA/PMA traceability from approved sources meeting MIL-DTL-5624 Type II specifications
- Dual certification compliance for operators maintaining both FAA and EASA approvals
Complete Hardware Solutions
Stock full aircraft hardware ranges including AN3 bolts, AN4 bolts, AN5 bolts, AN960 Light Series washers, AN960 Regular Series washers, countersunk washers, castle nuts, cotter pins, and safety wire. Technical support available for hardware selection and aircraft-specific applications across Cessna, Piper, Beechcraft, Cirrus, Diamond, Mooney, and European aircraft types.
Order AN970 Flat Washers Today
Fast dispatch from Dublin warehouse • VAT-compliant invoicing • EASA Part-21 documentation • Express EU delivery
Phone: +353 1 293 5408 | Email: [email protected]
