PartsTable
Technical Data Sheet
21439-1 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SUPPORT,PRESSURE RELIEF is a the manufacturer industrial component. Key specifications include material: GLASS OVERALL, scale_type: ETCHED STEMETCHED STEM, design_type: FLUCTUATINGFLUCTUATING, overall_length: 5.500 INCHES NOMINAL5.500 INCHES NOMINAL IN, actuating_medium: MERCURYMERCURY, style_designator: IMMERSION RING TOP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5895-01-192-0834, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO MRO_GENERAL 21439-1
NSN: 5895-01-192-0834
FSC: 5895
CAGE: 13973 — LITTON SYSTEMS INC. DIV NAVIGATION SYSTEMS DIVISION (USA)
SPECIFICATIONS
materialGLASS OVERALL
scale_typeETCHED STEMETCHED STEM
design_typeFLUCTUATINGFLUCTUATING
overall_length5.500 INCHES NOMINAL5.500 INCHES NOMINAL IN
actuating_mediumMERCURYMERCURY
style_designatorIMMERSION RING TOP
features_providedLENS MAGNIFYING FRONTLENS MAGNIFYING FRONT
securing_device_typeRINGRING
scale_accuracy_rating1/2 TO 1 PCT OF RANGE OF SCALE1/2 TO 1 PCT OF RANGE OF SCALE
end_item_identification5895-01-146-6736 DIGITAL COMMUNICATION TERMINAL
scale_measurement_range-15.000 TO 105.000 DEG CELSIUS-15.000 TO 105.000 DEG CELSIUS
scale_smallest_increment1.0 DEG CELSIUS1.0 DEG CELSIUS
NSN5895-01-192-0834
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SUPPORT,PRESSURE RELIEF TITLE COMPONENT PN 21439-1 MFR SUPPORT,PRESSURE RELIE
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATION5895-01-146-6736 DIGITAL COMMUNICATION TERMINAL
END ITEM IDENTIFICATION5895-01-146-6736 DIGITAL COMMUNICATION TERMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
21439Interchangeable
interchangeable cross-reference
interchangeable
21439-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21439-1?
21439-1 is a SUPPORT,PRESSURE RELIEF. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21439-1?
There are 2 known substitutes for 21439-1: 21439, 21439-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 21439-1?
21439-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5895-01-192-0834. This indicates validated use in U.S. government and defense supply chains.
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