The 8503K 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 8503K1 is a single-pole, double-throw toggle switch. Positions: ON-OFF-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: | 8503K1 |
| MIL SPEC: | MS24658-21A |
| ECCN: | EAR99 |
| MIL SPEC: | MS24658-21A |
| 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: Single-pole, Double-throw (SPDT)Switch operation: ON-OFF-ONMS part number: MS24658-21A
- Stock: Out of Stock
- Manufacturer Part #: 8503K1
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 only to customer-remorse returns and customer-initiated cancellations. If a problem is our fault (our cancellation, unavailability, wrong item, confirmed defect, or shipping damage) your refund is 100% with no fees.
- Return shipping: paid by buyer on customer-remorse returns; we pay return shipping when the problem is our fault.
- 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
We source products from manufacturers, authorized distributors, and established aviation suppliers as applicable. We are an independent reseller; we do not claim direct dealer or authorized-representative status for any brand. Documentation, source, and warranty eligibility vary by product and are confirmed 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.
