Overview
For Lycoming O-320-D3G engines and a range of other Lycoming powerplants, the **Lycoming STD-2090 lockwasher** serves a fundamental role in maintaining the integrity of bolted assemblies. This small but critical component is designed to prevent fasteners from loosening due to vibration, thermal cycling, and dynamic loads inherent in aircraft engine operation. By providing a spring-like action and resistance to rotation, the STD-2090 lockwasher helps ensure that nuts and bolts remain securely torqued, contributing directly to engine reliability and flight safety. It is a standard hardware item, essential wherever specified in Lycoming engine parts catalogs and maintenance manuals.Specifications
- Part Number: STD-2090
- Type: Lockwasher (likely split-ring or spring washer type, commonly used in Lycoming applications)
- Weight: 0.04 lb
- Dimensions:
- Length: 0.75 inches
- Width: 0.75 inches
- Height: 0.38 inches
- Material: (Specific material not specified, but typically hardened steel, often plated for corrosion resistance in engine environments)
- Finish: (Specific finish not specified, but commonly zinc or cadmium plated)
Aircraft Compatibility
The Lycoming STD-2090 lockwasher is a widely applicable standard part across numerous Lycoming engine models, ensuring secure fastening in various critical and non-critical applications. Its usage is determined by the specific fastener and assembly requirements outlined in the respective engine's Illustrated Parts Catalog (IPC) and overhaul manuals. Operators and maintenance personnel should always consult the official Lycoming documentation for precise applicability. This STD-2090 lockwasher is known to be compatible with- Stock: Out of Stock - On Backorder
- Manufacturer Part #: STD-2090
- Part#: STD-2090
Aircraft Fitment Finder
Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
