The 8504K series are environmentally sealed toggle switches that are completely protected from dust, moisture, and other contaminates. The lever lock mechanism prevents accidental switch operation.
Version 8504K43 is a double-pole, double-throw toggle switch. Positions: ON-ON-ON with A style bushing (locked in three positions)
- Locking lever safety mechanism (must be pulled outward for toggle operation)
- Threaded panel mount
- Thermoset molding materials meet flame retardant requirements
- Molded-in terminal inserts and terminal numbers
- Environmentally sealed per MIL-S-3950
- MS approved and QPL'd per MIL-S-3950
- Life: 20,000 operations at rated load 40,000 operations mechanical life
Product Codes | |
|---|---|
| Mfr Part No: | 8504K43 |
| MIL SPEC: | MS27408-1A |
| ECCN: | EAR99 |
| MIL SPEC: | MS27408-1A |
| SCHEDULE B CODE: | 8536.50.9065 |
Bushing:Â 15/32" - 32 threadTemperature Range:Â -85F to +160F (-65C to +71C)Contact current max: 20AContact Voltage AC: 115V nominalContact Voltage DC: 28VContact configuration: Double-pole, Double-throw (DPDT)Switch operation: ON-ON-ONMS part number: MS27408-1A
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: 8504K43
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.
