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Thermistor Temperature Probe/5k ohm, 6 lead wires, 5/8-18 thread with .80 tip 1B3A

Thermistor Temperature Probe/5k ohm, 6 lead wires, 5/8-18 thread with .80 tip 1B3A
Out of Stock
Thermistor Temperature Probe/5k ohm, 6 lead wires, 5/8-18 thread with .80 tip 1B3A
THERMISTOR TEMPERATURE PROBE/5k ohm, 6 lead wires, 5/8-18 thread with .80 tip 1B3A
TEMPERATURE PROBES Thermistor Probe 5/8-18 (.25 thread length) (Lycoming) 1B3A
Thermistor Probe
Dial Range:
5/8-18 (.25 thread length)
Dial Markings and Colors:
(Lycoming)
These 1BX Probes are also available as TSO'd Type K thermocouple. Please contact us for price and availability
1B3A Thermistor Probe | 5/8-18-3A Thread Size

UMA temperature probes provide engine monitoring of various engine components. These probes have a brass construction and various thread sizes to fit into many engine type and aircraft.

This Temperature Probe (Alternate Part# 1B3A) has a 5/8-18 (.25 thread length) with .80 tip and black 6-inch twisted lead wire pair.


  • 5/8-18-3A thread size
  • 0.31 tip diameter
  • 0.80 tip length
  • 5kΩ impedance

Product Codes

Mfr Part No:1B3A
ECCN:7A994
SCHEDULE B CODE:9014.20.8040


Weight: 2 ozTip Diameter: 0.31 inTip Length: 0.80 inThread Length: 0.30 inThread: 5/8-18-3AOverall Length: 1.50 inHex Head: 7/8 inWire Leads: 6-inch, 22 AWG, twisted pair (MIL-W-16878/4BHE0)Temperature Range: -50°C to 150°CImpedance: 5kΩ @ 25°CAccuracy: ±1°C @ 25°C

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  • Stock: Out of Stock
  • Manufacturer Part #: 1B3A
$129.50

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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.

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Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.