Overview
The Lycoming Retaining Ring (P/N sfb-2231) is a small, precision-engineered component vital for securing other parts within various Lycoming aircraft engine assemblies. Functioning as a critical fastener, this retaining ring prevents axial movement of components on a shaft or within a bore by fitting into a machined groove. Its role is essential in maintaining the correct positioning and operational integrity of associated engine sub-assemblies, contributing directly to the reliability and safe operation of the entire powerplant system.Specifications
The sfb-2231 retaining ring is manufactured to precise dimensions, ensuring a secure fit and reliable retention. Its compact size and robust construction are key to its performance in high-stress engine environments.- Part Number: sfb-2231
- Weight: 0.01 lb (approximately 4.5 grams)
- Dimensions:
- Length: 0.44 inches (11.18 mm)
- Width: 0.44 inches (11.18 mm)
- Height: 0.07 inches (1.78 mm)
- Material: Typically 302 Stainless Steel, as per the cross-referenced military standard for this type of retaining ring, offering excellent corrosion resistance and strength.
- Finish: Natural metallic, unplated.
- Type: External retaining ring, designed to fit into a groove on a shaft.
Aircraft Compatibility
The Lycoming Retaining Ring, part number sfb-2231, is a widely applicable component across a broad range of Lycoming aircraft engines. Its design allows for- Stock: Out of Stock - On Backorder
- Manufacturer Part #: sfb-2231
- Part#: sfb-2231
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.
